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The mitral valve papillary muscles in the left ventricle are called the anterolateral and posteromedial muscles. [3] Anterolateral muscle blood supply: left anterior descending artery - diagonal branch (LAD) and left circumflex artery - obtuse marginal branch (LCX)
24 lip 2023 · The classic description of the left cardiac ventricle is as containing two papillary muscles: the anterolateral and posteromedial. The anterolateral arises from the sternocostal wall, and the posteromedial papillary muscle arises from the diaphragmatic wall of the ventricle.
The posteromedial papillary muscle has a single arterial supply and the anterolateral muscle has a dual arterial supply. Cardiac MRI is an important imaging modality for papillary muscles due to high resolution, multi-planar capabilities, and soft tissue contrast.
29 kwi 2015 · One patient with Pap VA had isolated posteromedial papillary muscle scar, which correlated with the site of VA origin, whereas 2 of the 5 remaining Pap VA patients had evidence of LV chamber wall scar (n=1 inferoseptal, n=1 lateral), but no evidence of scar within the papillary muscle themselves.
14 gru 2018 · Ventricular arrhythmias originating from the papillary muscle of the left or right ventricle are specific clinical entities. They are usually focal in origin and can be identified by a characteristic ECG pattern.
22 maj 2023 · Posteromedial muscle rupture is 6 to 12 times more common than the anterolateral. About 50% of patients have single-vessel disease. Most cases of documented papillary muscle rupture demonstrate small areas of ischemia (usually less than 25% of the ventricle) with poor collaterals.
1 lis 2018 · The two left ventricular papillary muscles are small structures at sternocostal and inferior wall but are vital to mitral valve competence. Extra papillary muscles could be found. Partial or complete rupture, complicating acute myocardial infarction, causes severe or even catastrophic mitral regurgitation, potentially correctable by surgery.
