Resumen

Antecedentes: Coronario ateroesclerosis, que durante mucho tiempo se consideró una enfermedad inexorablemente progresiva, ahora se reconoce como biológicamente reversible bajo condiciones metabólicas e inflamatorias específicas. Los estudios de imágenes que utilizan ecografía intravascular (IVUS), coronaria tomografía computarizada angio-TC, y angiografía coronaria cuantitativa (QCA) demuestran consistentemente que la agresiva hipolipemiante o un cambio integral en el estilo de vida puede inducir una regresión mensurable de carga de placa. Sin embargo, el área luminal a menudo no se expande en paralelo, un fenómeno denominado paradoja de lumen. Para los atletas de resistencia, que dependen de una alta reserva de flujo coronario y una respuesta endotelial robusta, comprender esta paradoja es crucial.

Contenido Esta revisión sintetiza datos mecanísticos, clínicos y fisiológicos sobre regresión de la placa y remodelado vascular, con especial atención al corazón de atleta. Integra enfoques farmacológicos (estatinas, inhibidores de la PCSK9, terapia con omega-3) con evidencia sobre estrategias nutricionales basadas en alimentos integrales de origen vegetal (WFPB, por sus siglas en inglés) derivadas del trabajo de Dean Ornish y sus colaboradores. La revisión examina además la coexistencia paradójica de regresión y remodelación constrictiva, explora las consecuencias hemodinámicas de la circulación hiperdinámica y destaca nuevos hallazgos sobre la enfermedad coronaria subclínica en atletas máster.

Resumen: Placa la regresión representa la curación arterial auténtica, caracterizada por la depuración de lípidos, la estabilización fibrosa y inflamación resolución, incluso cuando las dimensiones luminales parecen estáticas. La terapia farmacológica asegura la normalización bioquímica, mientras que la nutrición WFPB restaura función endotelial y capacidad vasomotora. Juntos producen resiliencia estructural y rendimiento fisiológico.

Mensajes clave:

1. La regresión de la aterosclerosis es biológicamente real y clínicamente medible.
2. El lumen la paradoja surge de remodelación inversa, no fracaso del tratamiento.
3. La vasodilatación impulsada por el óxido nítrico endotelial puede permitir remodelación exterior bajo condiciones WFPB.
4. Para los atletas de resistencia, la cicatrización vascular y la optimización del flujo son objetivos terapéuticos duales.

Antecedentes

La ateroesclerosis comienza con retención subendotelial de apolipoproteína que contiene b lipoproteínas. Modificación oxidativa de LDL las partículas desencadenan una cascada de adhesión de monocitos, macrófago activación y migración de músculo liso. Durante décadas, esto conduce a placas ricas en lípidos, inflamadas y fibróticas que comprometen la elasticidad arterial. Históricamente, la enfermedad se consideraba irreversible; los datos de autopsias de mediados del siglo XX describían una progresión monótona engrosamiento intimal.

Sin embargo, los descubrimientos en el metabolismo de los lípidos, la biología de los macrófagos y la imagen vascular anularon este fatalismo. Cuando la afluencia de partículas aterogénicas cesan y la inflamación se resuelve, las placas pueden encogerse y reestabilizarse. La visión moderna es la de un equilibrio dinámico entre la lesión y la reparación, un proceso profundamente influenciado por colesterol transporte, integridad endotelial e inflamación sistémica.

La regresión involucra tres dominios interdependientes:

• Biología de la placa – depleción de lípidos, cambio de fenotipo de los macrófagos, matriz extracelular reconstrucción.
• Remodelación de embarcaciones – movimiento hacia afuera o hacia adentro de la membrana elástica externa que ajusta la tensión de la pared.
• Tono vasomotor – relajación del músculo liso vascular dependiente del óxido nítrico endotelial.

En ensayos clínicos, las intervenciones suelen mejorar el primer dominio mientras dejan los dos últimos sin cambios o incluso contraídos, lo que da lugar a la paradoja de la luz.

Mecanismos de regresión

Dinámica lipídica y celular

Cuando el colesterol LDL plasmático cae por debajo del umbral de retención intimal (≈50 mg/dL), el flujo de entrada de lípidos disminuye. Los macrófagos células espumosas activar los transportadores de casete de unión a ATP ABCA1 y ABCG1, que exporta colesterol a apoA-I y HDL. A medida que el eflujo de colesterol supera al influjo, las gotitas lipídicas intracelulares se disuelven y los macrófagos adoptan un fenotipo M2 reparador que secreta citocinas antiinflamatorias y componentes de la matriz.

Resolución de la inflamación y remodelación de la matriz

Menor activación de NF-κB y inflamasoma NLRP3 las vías disminuyen la interleucina-1β y el factor de necrosis tumoral alfa. Metaloproteinasa de matriz la expresión de las (MMP) disminuye mientras que los inhibidores tisulares de las metaloproteinasas (TIMP) aumentan, lo que favorece el engrosamiento de la cubierta fibrosa. La síntesis de colágeno por parte de las células de músculo liso estabiliza el lesión y previene la ruptura.

Recuperación endotelial y biología del óxido nítrico

Óxido nítrico sintasa endotelial (eNOS) desacoplamiento, un sello distintivo de estrés oxidativo, se invierte a medida que mejora la disponibilidad de tetrahidrobiopterina. El NO restaura la vasodilatación, inhibe la agregación plaquetaria y reduce adhesión leucocitaria. Ejercicio, nitratos vegetales y polifenoles amplificar esta vía mediante la señalización de GMP cíclico.

Modulación del estrés oxidativo

Especies reactivas del oxígeno (ROS) generadas por la NADPH oxidasa y la eNOS desacoplada aceleran aterogénesis. La regresión se acompaña de la activación de la antioxidante factor de transcripción Nrf2, regulación al alza de la hemo oxigenasa-1 y reducción peroxidación lipídica. Estos cambios reducen la permeabilidad endotelial y preservan la biodisponibilidad del NO.

Células progenitoras endoteliales y reparación

Estatinas de alta intensidad, ejercicio aeróbico, y la nutrición WFPB movilizan células progenitoras endoteliales de la médula ósea, facilitando la reendotelialización y mejorando la salud microvascular.

De forma acumulativa, estos procesos transforman las placas, pasando de estar cargadas de lípidos y ser propensas a la ruptura a volverse fibróticas y quiescentes, una forma auténtica de curación arterial incluso cuando el diámetro de la luz permanece inalterado.

Evidencia fundamental de modelos de primates

Mucho antes de los ensayos de imágenes en humanos, el trabajo fundamental en modelos de primates no humanos estableció la plausibilidad biológica de la regresión. Estos estudios demostraron que, tras inducir la aterosclerosis con dietas ricas en colesterol, el cambio a una dieta de regresión (baja en grasa) provocaba una marcada depleción de lípidos en las paredes arteriales, reparación endotelial y estabilización estructural de las lesiones. Estos primeros datos en animales confirmaron que la aterosclerosis no era un punto final irreversible, sino un proceso dinámico receptivo a cambios profundos en el entorno lipídico.

Tabla 1. Estudios de regresión en primates no humanos

Modelos de primates comparativos que ilustran los mecanismos biológicos de depleción lipídica, reparación endotelial y regresión estructural tras una intervención dietética o farmacológica.

Estudio	Especie	Intervención	Duración	Resultado
Armstrong y col., 1970¹³	Macaco Rhesus	Dieta baja en colesterol después de una alimentación aterogénica	24 meses	Depleción lipídica marcada y reparación endotelial
Vesselinovitch & Wissler, 1976¹⁴	Macaca fascicularis	Dieta libre de colesterol	18 meses	Pérdida de lípidos de la pared y curación de la matriz
Clarkson y otros, 1981¹⁵	Macaca mulatta	Dieta de regresión (baja en grasa)	48 meses	Grosor íntimo reducido y lesiones estabilizadas
Hecker et al., 2022¹⁶	Macaca fascicularis	Dieta de regresión + terapia hipolipemiante de LDL	12 meses	Menor estrés oxidativo y mejor NO endotelial

Regresión farmacológica: estatinas, inhibidores de PCSK9 y terapia con omega-3

Estatinas de alta intensidad

El Ensayo ASTEROID demostró que rosuvastatina reducido a 40 mg diarios volumen percentual de ateroma (PAV) por 0,98% y volumen total de ateroma (VTA) en 6,81 TP9T a lo largo de 24 meses.¹ El Ensayo SATURN confirmaron estos hallazgos en dos estatinas potentes, mostrando que la magnitud de la reducción de C-LDL se correlacionaba directamente con la magnitud de la regresión.² Más allá de la reducción de lípidos, las estatinas exhiben efectos pleiotrópicosdisminuido Proteína C reactiva, un acoplamiento mejorado de la eNOS y una reducción del estrés oxidativo.³ Estos beneficios antiinflamatorios ayudan a explicar la reducción de eventos incluso con niveles moderados de LDL.

Inhibidores de la PCSK9

PCSK9 promueve la degradación lisosomal hepática receptores de LDL. Inhibición por anticuerpos monoclonales (evolocumab, alirocumab) mejora el reciclaje de receptores, produciendo valores de c-LDL <30 mg/dL. En GLAGOV, el tratamiento con evolocumab más estatinas produjo una reducción adicional de 1% en la PAV en comparación con el tratamiento solo con estatinas.⁴ PACMAN-AMI y Huygens reveló más grueso cápsulas fibrosas y más pequeño núcleos lipídicos con la inhibición de PCSK9.⁵⁻⁶ A pesar de estos beneficios histológicos, el área luminal media cambió poco, lo que es consistente con una remodelación inversa en lugar de una obstrucción persistente.

Ácidos grasos omega-3 (Icosapent etilo)

En EVAPORATE, las dosis altas etil de icosapento reduced low-attenuation plaque by 17% versus placebo and increased fibrous tissue.⁷ EPA incorporates into phospholipid membranes, decreases arachidonic-acid–derived eicosanoids, and forms resolvins and protectins that actively resolve inflammation. By modulating lipid mediators and improving endothelial compliance, EPA may complement statin therapy to achieve both stability and vasomotor benefit.

Whole-Food, Plant-Based Lifestyle and Coronary Regression

Dean Ornish’s studies remain foundational. In The Lancet (1990) and JAMA (1998) trials, participants following a low-fat, WFPB diet combined with stress management, exercise, and fumar cessation showed a 7.9% angiographic improvement in estenosis at five years without pharmacologic therapy.⁸⁻⁹ These findings signaled that coronary atherosclerosis could regress through behavioral change alone.

Mechanisms of Lifestyle-Driven Regression

• Lipid effects: Eliminating animal fat reduces hepatic LDL output; soluble fibra enhances cholesterol excretion.
• Endothelial function: Plant nitrates from leafy greens raise NO availability; polyphenols improve eNOS phosphorylation.¹⁷,²¹
• Oxidative and inflammatory tone: Antioxidant intake limits ROS; CRP and adhesion molecules decline.²⁰,²²
• Microbiome modulation: Reduced production of trimethylamine N-oxide (TMAO) and increased short-chain fatty acids lower systemic inflammation.
• Metabolic integration: Mejorado sensibilidad a la insulina and reduced lipemia posprandial relieve endothelial stress.

Large cohort data (Adventist Health Study-2, EPIC-Oxford) confirm lower cardiopatía isquémica incidence among predominantly plant-based populations. Lifestyle modification thus exerts biochemical, structural, and functional synergy.

For endurance athletes, these mechanisms offer an added advantage—sustained endothelial NO output enabling superior vasomotor adaptability. Unlike pharmacologic regression, which may encourage constrictive remodeling, lifestyle-driven recovery often preserves outward compliance, aligning health with performance.

Imaging Evidence and the Nature of Plaque Regression

Modern imaging modalities have transformed regression from a biochemical abstraction into a quantifiable phenomenon. The advent of high-resolution intravascular and noninvasive imaging has allowed researchers to characterize plaque composition, vascular remodeling, and luminal geometry over time.

Intravascular Ultrasound (IVUS)

IVUS has been the cornerstone of regression trials since the 1990s. It enables three-dimensional volumetric assessment of ateroma burden and vessel wall area. Unlike angiography, which reflects only the lumen, IVUS visualizes the entire arterial wall, revealing compensatory remodeling, lipid pools, and calcificación. In regression, decreases in PAV and TAV typically precede or occur independently of luminal change. Virtual histology (VH-IVUS) further distinguishes plaque components, demonstrating that intensive lipid lowering increases fibrous content and reduces núcleo necrótico volume.

Optical Coherence Tomography (OCT) and Near-Infrared Spectroscopy (NIRS)

OCT provides near-histologic resolution of fibrous-cap thickness—an essential predictor of rupture risk. Following intensive therapy, OCT reveals a thicker, more uniform cap with fewer microchannels. NIRS and NIRS-IVUS hybrid catheters can quantify lipid-core burden index (LCBI), showing significant decreases under PCSK9 or omega-3 therapy. Together, these technologies validate structural stabilization even when lumen geometry appears static.

Coronary Computed Tomography Angiography (CCTA)

CCTA offers noninvasive, whole-vessel visualization and plaque characterization. In trials such as EVAPORATE, CCTA demonstrated marked regression of low-attenuation, placa rica en lípidos following high-dose EPA.⁷ Importantly, these changes were independent of total calcium burden, indicating that compositional transformation—not calcific expansion—explains improved stability. Serial CCTA studies now provide a clinical tool for following regression in asymptomatic patients or athletes who require longitudinal monitoring without catheter-based imaging.

Magnetic Resonance Imaging (MRI)

High-field MRI quantifies carotid and coronary plaque components, identifies inflammation via gadolinium enhancement, and can measure microvascular perfusion. Serial MRI studies show decreased plaque lipid fraction and improved endothelial-dependent vasodilation following statin or lifestyle therapy.¹²

Collectively, multimodal imaging has confirmed that plaque regression is an integrated biological process—shifting composition, reducing inflammation, and restoring wall integrity—rather than simply enlarging the lumen.

Table 2. Major Human Regression Trials

Summary of pivotal human trials demonstrating plaque regression with pharmacologic and lifestyle interventions, measured via advanced imaging modalities.

Estudio	Intervención	Imaging	Plaque Effect	Lumen Effect
ASTEROID¹	Rosuvastatin 40 mg	IVUS	↓PAV 0.98%, ↓TAV 6.8%	Neutral
SATURN²	Rosuvastatin vs Atorvastatina	IVUS	Regression in both groups	Variable
GLAGOV⁴	Evolocumab + Statin	IVUS	Greater regression	Neutral
EVAPORATE⁷	Icosapent Ethyl + Statin	CCTA	↓Lipid-rich plaque	Neutral
ORNISH⁸⁻⁹	Whole-Food, Plant-Based Lifestyle	QCA	Mild angiographic improvement	Functional gain

The Lumen Paradox and Reverse Remodeling

One of the most counterintuitive findings in cardiovascular medicine is that measurable plaque regression rarely produces commensurate increases in lumen area. This paradoja de lumen originates from the mechanical behavior of arteries under chronic stress.

In the 1987 Glagov study, human autopsies demonstrated agrandamiento compensatorio of the membrana elástica externa (MEE) during plaque growth—a mechanism preserving lumen size until approximately 40% of the cross-sectional area is occupied by plaque.¹⁰ Beyond this threshold, compensatory expansion fails, and stenosis becomes evident.

When plaques regress, however, inflammation subsides and wall stress normalizes. The EEM may contract, reversing prior dilation. This remodelación inversa results in smaller or unchanged luminal areas even though plaque burden decreases and arterial wall composition improves.¹¹ Far from pathological, this constrictive adjustment restores physiologic tension across the media and adventicia.

Reverse remodeling likely represents the vascular system’s attempt to reestablish efficient wall stress distribution. Imaging and histologic studies confirm that despite static lumen dimensions, fibrous content increases, necrotic core diminishes, and mechanical stability improves.¹²

Implications for Endurance Athletes

For endurance athletes, the paradox raises practical questions. Their coronary flow reserve must accommodate 5–6 fold increases in cardiac output during maximal exertion. Even minor constrictive remodeling could theoretically reduce peak perfusion capacity. Yet, this risk may be mitigated by enhanced endothelial function and óxido nítrico–mediated vasodilation in athletes, which can expand lumen radius dynamically during exercise. Thus, functional flow reserve, rather than static lumen size, becomes the critical determinant of performance and safety.

Subclinical Coronary Artery Disease and Calcification in Master Endurance Athletes

Over the last decade, a surprising body of research has revealed that lifelong endurance exercise does not render the coronary tree immune to atherosclerosis. In fact, some studies suggest a higher prevalence of coronary plaque and calcification in elite or master athletes compared with age-matched sedentary controls.

The Merghani et al. Study (2017, Circulation)

Merghani and colleagues examined 152 male and female master endurance athletes (mean age 54) and compared them with 92 healthy controls matched for age and factores de riesgo.¹⁷ Using CCTA, they found that 44% of male athletes exhibited coronary plaques compared with 22% of controls. Eleven percent of athletes had puntuaciones de calcio greater than 300 unidades Agatston, and 7.5% had luminal stenoses exceeding 50%. Intriguingly, the plaques in athletes were predominantly calcified (72.7%) rather than mixed or lipid-rich, suggesting greater stability despite higher total burden. Furthermore, 14% of male athletes displayed silent myocardial fibrosis on resonancia magnética cardíaca—evidence of prior subclinical ischemic injury.

Confirmatory and Contrasting Studies

These findings were expanded by Aengevaeren et al. (European Heart Journal, 2017), who reported a U-shaped relationship between lifetime exercise volume and CAC burden.¹⁸ Moderate exercisers had the lowest scores, while those performing extreme lifelong endurance training had higher CAC and plaque prevalence but a more calcified, stable phenotype. Baggish and Levine (2017) interpreted these data as an adaptation—exercise may accelerate calcification of existing soft plaques, converting them into stable, quiescent structures less likely to rupture.¹⁹

Mechanistic Hypotheses

The mechanisms underlying this paradoxical calcification include repetitive shear stress, transient oxidative injury, and microvascular trauma during prolonged high-intensity training. These stimuli can induce vascular smooth-muscle cell osteogenic transformation, promoting microcalcification that later consolidates into dense calcium sheets.

Despite these structural findings, event rates among endurance athletes remain remarkably low, suggesting that plaque stability outweighs burden. Calcification, in this context, may represent adaptive fibrosis rather than disease progression.

Clinical Implications for Screening

These insights reshape preventive cardiology in athletes. Traditional risk scores underestimate CAD prevalence in this group, while symptoms may be masked by superior conditioning. Selective imaging—particularly CAC scoring or CCTA—is appropriate for athletes over 45 with historial familiar, dislipidemia, or unexplained performance decline. Identifying stable, calcified lesions guides counseling without discouraging training.

For clinicians, understanding the distinction between plaque burden and plaque vulnerability is essential. A highly calcified lesion may signal a healed or stabilized arteria, whereas non-calcified, lipid-rich plaques remain the real threat—even in the apparently “fittest” hearts.

Silent Ischemia and Pain Processing in Endurance Athletes

The absence of symptoms in athletes with significant coronary disease has long puzzled clinicians. This “isquemia silenciosa” phenomenon is now understood as a consequence of neurobiologic adaptation to chronic exertion and repeated sympathetic activation.

Neurophysiologic Basis

Prolonged endurance training elevates endogenous opioid peptides—β-endorphins and enkephalins—which blunt nociceptive signaling through μ-opioid receptors in the central and peripheral nervous system.²⁴ Functional MRI studies demonstrate decreased activation of the insular and anterior cingulate cortices—regions associated with pain perception—in trained athletes during noxious stimuli. This central adaptation effectively raises the threshold for discomfort and reclassifies early ischemic sensations as normal exertion.

Clinical Evidence

Several cohorts of master athletes have shown electrocardiographic or perfusion evidence of myocardial isquemia in the absence of chest pain. Exercise thallium imaging studies from the 1990s first identified this pattern; more recent PET and MRI data confirm ischemia without angina during maximal workloads. Importantly, some of these athletes exhibit realce tardío con gadolinio consistent with silent myocardial fibrosis—“healed” infarcts unrecognized during life.¹⁷

Implications for Clinical Assessment

Because athletes may misinterpret or ignore prodromal symptoms, reliance on symptom-driven testing is inadequate. Cardiologists should consider baseline CAC or CCTA screening in athletes over 45 years old, particularly those with familial dyslipidemia or long training histories. Exercise stress testing with imaging—rather than ECG alone—can reveal perfusion defects that plain treadmill tests miss.²³ Recognition of silent ischemia is crucial to prevent sudden eventos cardíacos during competition.

Hemodynamic Principles: Why Millimeters Matter

To appreciate how structural and functional changes translate to performance, one must understand the physics governing blood flow. Coronary blood flow follows Poiseuille’s law, which states:

$$Q = \frac{\pi \cdot \Delta P \cdot r^4}{8 \cdot \mu \cdot L}$$

where $Q$ is flow, $\Delta P$ is pressure difference, $r$ is vessel radius, $\mu$ is blood viscosity, and $L$ is vessel length. Flow thus increases with the fourth power of radius.

Physiologic Consequences

A 10% increase in radius increases flow by approximately 46%; a 20% increase nearly doubles it. Conversely, small decreases in radius—whether from plaque accumulation or constrictive remodeling—produce disproportionate reductions in perfusion capacity. For endurance athletes whose cardiac output may reach 30 L/min, these geometric nuances determine the ceiling of aerobic performance.

Dynamic Vasomotion

During exercise, coronary vasodilation is mediated by shear-stress–induced NO release. Healthy endotelio expands epicardial vessels and dilates arterioles to match myocardial oxygen demand. When disfunción endotelial coexists with plaque, this dilation reserve is blunted. Lifestyle interventions that enhance NO availability—such as WFPB diets rich in dietary nitrates and polyphenols—restore this reserve, effectively expanding functional lumen radius even if anatomic dimensions are static.

Integration with Regression

Pharmacologic therapies reduce plaque and risk; lifestyle therapies maintain or enhance flow. The combination creates a “dual benefit”: structural regression within the wall and preserved hemodynamic reserve in the lumen. This synergy underpins the thesis that optimal care of the endurance athlete requires both medical and nutritional precision.

Clinical Implications and Author Perspective

The convergence of molecular biology, imaging science, and performance physiology underscores a transformative principle: vascular health and athletic performance are not separate domains but mutually reinforcing.

For clinicians, regression is no longer an aspirational concept but a measurable endpoint. Percent atheroma volume, plaque composition, and cap thickness have replaced crude angiographic narrowing as markers of success. Yet, for the athlete, the practical endpoint remains flow reserve—the ability of the coronary circulation to respond instantaneously to metabolic demand.

Pharmacologic therapy secures biochemical normalization; lifestyle modification restores endothelial adaptability. The challenge is to personalize interventions such that structural regression does not come at the expense of vasomotor responsiveness.

It is within this framework that Dr. Peter Megdal’s personal experience becomes instructive.

Author Reflection: The N + 1 Story — Healing, Adaptation, and Performance

Dr. Peter Megdal, a lifelong endurance athlete and scientist, exemplifies the dual pursuit of vascular healing and human performance. In his early fifties, despite holding several age-group world records in ultra-endurance events, he was unexpectedly found to have subclinical coronary atherosclerosis during imaging performed for research. The discovery was paradoxical: how could someone with exceptional aerobic capacity harbor measurable plaque?

Rather than view this as defeat, Dr. Megdal approached it as the ultimate experiment—his “N + 1” study, the one subject who mattered most. Drawing on decades of biochemical expertise, he implemented a rigorous combination of intensive lipid lowering, whole-food plant-based nutrition, and structured endurance training designed around recovery and endothelial optimization.

Over months, lipid levels normalized, inflammatory markers declined, and repeat imaging showed regression of plaque burden. Endothelial function, assessed by flow-mediated dilation, improved dramatically. Subjectively, recovery times shortened, and performance metrics—power output, VO₂ max, lactate threshold—surpassed pre-diagnosis levels. Within two years, he returned to elite competition and established new age-group world records, a living demonstration that arterial healing and peak human function can coexist.

Dr. Megdal’s journey illustrates the paper’s central argument: that regression is not merely an imaging artifact but a biological transformation that, when aligned with lifestyle and disciplined training, restores both vascular integrity and athletic potential. His experience reframes the physician-scientist’s role—from treating disease to guiding adaptive performance grounded in physiology.

Future Directions

1. Beyond LDL: Molecular and Functional Targets

The traditional emphasis on LDL-cholesterol reduction, while transformative, represents only part of the regression equation. Future therapies will increasingly target residual inflammatory and oxidative pathways. Agents modulating interleukin-1β (e.g., canakinumab) or lipoproteína(a) hold promise for individuals with low LDL yet persistent plaque activity. For athletes, whose oxidative flux is naturally elevated, therapies that temper reactive oxygen species without blunting mitochondrial adaptation may optimize both vascular and muscular recovery.

Simultaneously, attention is shifting toward functional outcomes—arterial compliance, flow-mediated dilation, and endothelial repair capacity—as more relevant markers of cardiovascular fitness than static lipid values. Integration of these physiologic metrics into athletic screening may redefine how cardiometabolic performance is measured.

2. Advanced Imaging and Computational Hemodynamics

Serial CCTA and IVUS will continue to refine our understanding of regression kinetics. Next-generation photon-counting CT and ultra-high-resolution MRI promise to detect microcalcification, cap thickness, and neovascularization with unprecedented clarity. When paired with computational fluid dynamics, these images can model shear stress distribution, predicting which plaques will regress or stabilize under various interventions.

For athletes, such modeling could reveal how training intensity, heart rate variability, and coronary flow patterns interact with plaque biology—a fusion of engineering and medicine that may personalize training prescriptions to minimize vascular stress.

3. Lifestyle–Pharmacologic Synergy

Emerging evidence supports a hybrid model: pharmacologic LDL-C suppression combined with whole-food, plant-based nutrition to sustain endothelial tone and systemic salud metabólica. This integrated approach aligns with the concept of systems biology—addressing multiple convergent pathways rather than a single biochemical target.

Randomized trials comparing pharmacologic therapy alone versus combination with WFPB interventions are urgently needed. Endpoints should extend beyond plaque regression to include arterial elasticity, flow reserve, and athletic performance metrics. Such studies could redefine cardiovascular prevention as a continuum between disease management and physiologic optimization.

4. Exercise Physiology and Adaptive Remodeling

An unresolved question concerns how chronic endurance training interacts with regression and remodeling. Is the increased calcification seen in lifelong athletes a benign stabilization process or an adaptive trade-off? Understanding the cellular signals that drive osteogenic transformation in vascular smooth muscle could reveal ways to preserve arterial flexibility without compromising stability.

Future research should distinguish between beneficial physiologic remodeling and maladaptive calcification, possibly through longitudinal cohorts combining high-resolution imaging with molecular biomarcadores of bone–vascular crosstalk (e.g., osteoprotegerin, BMP-2).

5. Precision Prevention in Athletic Cardiology

As data accumulate, prevention will become individualized—integrating lipidomics, metabolomics, genetic risk scores, and imaging biomarkers to craft precise regimens. Machine-learning models may soon predict who among master athletes is most likely to develop subclinical CAD despite fitness, and who will benefit most from aggressive lipid lowering versus lifestyle modification alone.

This personalized approach will ensure that the mantra “fit but not immune” translates into actionable, evidence-based prevention.

Conclusion

Atherosclerosis regression represents one of the most hopeful narratives in modern cardiovascular medicine. It is not merely the reversión of a pathological process but the reawakening of the vessel’s innate capacity for repair. From molecular efflux to endothelial restoration, regression exemplifies biology’s plasticity—a dynamic equilibrium between injury and healing.

The lumen paradox—regression without enlargement—reminds us that vascular health cannot be judged by geometry alone. Stability, composition, and functional responsiveness are equally vital. For endurance athletes, whose survival and success depend on maximizing coronary flow, small improvements in radius or endothelial tone yield exponential gains in performance, as defined by Poiseuille’s law.

Pharmacologic therapy and WFPB nutrition are not competing paradigms but complementary instruments of the same symphony: one removes the pathological stimulus; the other restores physiologic harmony. Together they promote a vessel that is not only structurally sound but dynamically alive.

Dr. Peter Megdal’s “N + 1 Story” embodies this synthesis. His journey from the discovery of ateroesclerosis subclínica to documented regression and renewed world-record performance symbolizes the translation of scientific knowledge into human transformation. It illustrates that the frontier of cardiovascular medicine lies not merely in survival, but in the realization of optimal function—arterial, cellular, and human.

Acknowledgment

The author reports no conflicts of interest.

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