<P> The anterolateral papillary muscle more frequently receives two blood supplies : left anterior descending ( LAD ) artery and the left circumflex artery ( LCX ) . It is therefore more frequently resistant to coronary ischemia ( insufficiency of oxygen - rich blood ) . On the other hand , the posteromedial papillary muscle is usually supplied only by the PDA . This makes the posteromedial papillary muscle significantly more susceptible to ischemia . The clinical significance of this is that a myocardial infarction involving the PDA is more likely to cause mitral regurgitation . </P>
<P> The anterolateral papillary muscle more frequently receives two blood supplies : left anterior descending ( LAD ) artery and the left circumflex artery ( LCX ) . It is therefore more frequently resistant to coronary ischemia ( insufficiency of oxygen - rich blood ) . On the other hand , the posteromedial papillary muscle is usually supplied only by the PDA . This makes the posteromedial papillary muscle significantly more susceptible to ischemia . The clinical significance of this is that a myocardial infarction involving the PDA is more likely to cause mitral regurgitation . </P>
which area of the heart receives its blood supply from the left circumflex artery
which area of the heart receives its blood supply from the left circumflex artery
anterolateral papillary muscle
anterolateral papillary muscle