ανατομια Flashcards
The most posterior heart chamber of a 60-y/o man with hypertension is enlarged. Which chamber is it? What noncardiac symptoms may he have?
Left atrium; dysphagia (due to compression of esophageal nerve) or hoarseness (due to recurrent compression of laryngeal nerve)
You suspect that a patient has an occluded coronary artery. Occlusion is most common in which coronary artery? What does that artery supply?
Left anterior descending; supplies anterior 2/3 of interventricular septum, anterolateral papillary muscle, anterior left ventricle
Coronary artery blood flow peaks during ____ (early/late) ____ (systole/diastole).
Early diastole
A patient has bradycardia after a myocardial infarction. Which coronary artery is most likely affected? Why?
RCA; usually supplies the sinoatrial/atrioventricular nodes (infarct causes nodal dysfunction → bradycardia or heart block)
In the most common arrangement of coronary artery anatomy, the posterior descending artery arises from which structure?
The right coronary artery
The left circumflex coronary artery supplies which portions of the adult heart?
Lateral and posterior walls of the left ventricle, as well as the anterolateral papillary muscle
Blood supply to the right ventricle is provided by which coronary artery?
The right (acute) marginal artery
What percentage of people have left dominant, right dominant, and codominant coronary circulation, respectively? Define these terms.
80% = left (PDA arises from LCX), 85% = right (PDA arises from RCA), and % = codominant (PDA arises from both LCX and RCA)
• A heart autopsy shows necrosis of the posterior ventricular walls. Which artery was likely occluded? Where else would you expect necrosis?
Posterior descending/interventricular artery (PDA); it also supplies posterior 1/3 of interventricular septum/posteromedial papillary muscle
