Coronary Artery Tortuosity and Spontaneous Coronary Artery Dissection: Association With Echocardiography and Global...

Spontaneous Coronary Artery Dissection (SCAD) represents a significant cause of myocardial infarction among young to middle-aged women without traditional cardiovascular risk factors. Prior research has shown that non-atherosclerotic vascular abnormalities frequently coexist with these acute coronary events, suggesting a systemic underlying arteriopathy. Clinicians often observe winding or twisted vessel paths during diagnostic imaging, yet the clinical relevance of these morphological variations remains poorly defined. While some studies suggest a link between vessel curvature and mechanical stress, the specific impact on myocardial performance and long-term patient outcomes is not well established. Existing literature focuses primarily on the acute management of dissection rather than the chronic structural and functional cardiac changes connected to vessel shape. The relationship between arterial twisting, systemic conditions like Fibromuscular Dysplasia (FMD), and the risk of recurrent vascular events requires deeper investigation to improve patient stratification. This absence of evidence motivated a comprehensive evaluation of how vessel morphology influences cardiac health and systemic disease prevalence in this specific patient population.

This prospective imaging cohort study evaluates the correlation between Coronary Artery Tortuosity (TCA) and cardiac anatomy among individuals who experienced Spontaneous Coronary Artery Dissection (SCAD). Researchers sought to determine if increased vessel twisting influences myocardial function as measured by advanced echocardiographic techniques like speckle tracking. The investigation specifically examines the prevalence of Fibromuscular Dysplasia (FMD) in patients presenting with different degrees of arterial curvature to identify systemic patterns. Investigators tracked long-term clinical outcomes, including the recurrence of dissection events and mortality rates, over a median follow-up period of 4.4 years. The project analyzes how age and hypertension status interact with arterial morphology to influence diastolic function and ventricular geometry in post-dissection patients. Scientists aimed to clarify whether tortuous vessels serve as a marker for more severe systemic vascular disease or impaired Global Longitudinal Strain (GLS). The study also intended to provide a detailed phenotypic description of the SCAD population to assist in future risk assessment and clinical decision-making.

The research team enrolled 116 participants who had a confirmed diagnosis of Spontaneous Coronary Artery Dissection (SCAD) for a prospective imaging analysis. Clinicians used coronary angiography to identify and quantify the presence of Coronary Artery Tortuosity (TCA) based on established visual criteria during the initial diagnosis. Comprehensive echocardiography provided detailed assessments of cardiac structure, including the measurement of the median ejection fraction and left ventricular geometry at a median of 10.9 months post-event. Advanced speckle-tracking software calculated Global Longitudinal Strain (GLS) to detect subtle impairments in myocardial contractility that standard imaging might miss. The protocol included screening for Fibromuscular Dysplasia (FMD) across multiple vascular beds to assess systemic arterial involvement in 53.4% of the total cohort. Statistical models, including Kaplan-Meier analysis with a 95% confidence interval, estimated the three-year recurrence rate of dissection events within the cohort. Researchers performed comparative analyses between groups with and without tortuous vessels using P-values to determine the significance of age and comorbidity differences.

Patients exhibiting coronary artery tortuosity were significantly older than those with straight vessels, with mean ages of 52.1 and 44.7 years respectively (P < .001). The prevalence of Fibromuscular Dysplasia (FMD) was markedly higher in the tortuous vessel group at 59.4% compared to only 25% in the non-tortuous group (P = .007). Quantitative analysis revealed that each decade of life corresponded to an approximately 0.89-unit increase in the coronary tortuosity score across an age range of 31.5 to 66.9 years. Most participants maintained normal cardiac function, evidenced by a median ejection fraction of 61% and a median Global Longitudinal Strain (GLS) of -22.2%. Diastolic dysfunction occurred in 13.4% of the cohort and showed a strong link to active hypertension during the imaging session. The three-year recurrence rate for Spontaneous Coronary Artery Dissection (SCAD) reached 9.4%, while the study recorded zero deaths during the follow-up period. Hypertension was present in 35.3% of the total population, but its prevalence did not differ significantly between those with and without tortuous arteries.

Coronary Artery Tortuosity (TCA) appears to be a common morphological feature in patients with Spontaneous Coronary Artery Dissection (SCAD), particularly as they age. The strong connection between vessel twisting and Fibromuscular Dysplasia (FMD) suggests that tortuosity may be a manifestation of a broader systemic arteriopathy. Normal Global Longitudinal Strain (GLS) values indicate that the presence of tortuous coronary arteries does not typically impair resting myocardial performance in this population. Clinical management should prioritize screening for systemic vascular conditions in older patients who present with significant arterial winding and a history of dissection. Future research should investigate whether the mechanical stresses connected to tortuosity contribute to the 9.4% recurrence rate observed in this population. These findings provide reassurance regarding the preservation of cardiac function following a dissection event, regardless of the underlying vessel morphology. Understanding the link between age and vessel curvature helps clinicians better interpret imaging results in the context of long-term vascular health.