Título Em Cirurgia Cardiovascular SBCCV Practice Questions - Título De Especialista Em Cirurgia Cardiovascular (SBCCV AMB) Exam

Access More Questions

In the left ventricle, the papillary muscles support the mitral valve leaflets via primary, secondary, and tertiary chordae tendineae. Why is the posteromedial papillary muscle significantly more vulnerable to ischemic rupture following myocardial infarction than the anterolateral papillary muscle?

The posteromedial papillary muscle receives blood solely from the conus branch of the right coronary artery. The anterolateral papillary muscle has no chordal attachments to the posterior mitral leaflet, reducing mechanical wall tension. The posteromedial papillary muscle is composed entirely of fibrous connective tissue with minimal vascular microcirculation. The posteromedial papillary muscle relies on a single arterial blood supply (usually the posterior descending artery - PDA), whereas the anterolateral papillary muscle has dual blood supply (LAD and LCx).

Correct Answer:

The posteromedial papillary muscle relies on a single arterial blood supply (usually the posterior descending artery - PDA), whereas the anterolateral papillary muscle has dual blood supply (LAD and LCx).

Access more questions from this quiz

Continue to Título em Cirurgia Cardiovascular SBCCV Practice Questions - Título de Especialista em Cirurgia Cardiovascular (SBCCV AMB) Exam for more practice questions and the full quiz experience.

Access More Questions