Role of Cardiac Imaging in Myocardial Infarction With Non-Obstructive Coronary Arteries

Area of Science:

• Cardiology
• Medical Imaging

Background:

• Myocardial infarction with non-obstructive coronary arteries (MINOCA) is increasingly recognized as a significant clinical issue.
• MINOCA is associated with substantial morbidity and major adverse cardiac events, challenging previous perceptions of it being benign.
• Current guidelines recommend a structured approach to differentiate causes of elevated cardiac troponins.

Purpose of the Study:

• To highlight the role of Cardiac Magnetic Resonance (CMR) in the diagnosis and risk stratification of MINOCA.
• To emphasize the importance of differentiating ischemic from non-ischemic causes of MINOCA.
• To underscore the prognostic value of CMR in MINOCA patients.

Main Methods:

• Utilizing CMR for tissue characterization to identify ischemic patterns (wall motion abnormalities, edema, late gadolinium enhancement).
• Differentiating MINOCA from non-ischemic conditions like Takotsubo cardiomyopathy and myocarditis using CMR.
• Combining CMR with intravascular imaging for comprehensive assessment of MINOCA mechanisms.

Main Results:

• CMR effectively identifies ischemic patterns and aids in differentiating MINOCA from non-ischemic cardiac entities.
• The combination of CMR and intravascular imaging is optimal for determining underlying ischemic mechanisms in MINOCA.
• CMR provides crucial prognostic information, identifying patients at higher risk for adverse cardiovascular outcomes.

Conclusions:

• CMR is pivotal in the diagnostic pathway for MINOCA, offering detailed tissue characterization.
• Integrating CMR into MINOCA management improves patient outcomes and deepens understanding of this condition.
• CMR facilitates accurate diagnosis, risk stratification, and targeted management strategies for MINOCA.