Cardiology Quiz #4: Pericardium and Blood Supply to the Heart

1. A 55-year-old man with a history of hypertension and diabetes mellitus presents to the emergency department with severe chest pain radiating to the back and dyspnea. An echocardiogram shows a dilated aorta and a diagnosis of aortic dissection is made. The dissection is noted to involve the ascending aorta. Which of the following arteries is most at risk of being compromised by this condition, potentially leading to myocardial ischemia? 

Question 1 of 5

2. A 60-year-old woman presents with sharp, pleuritic chest pain that improves when she leans forward. She has a low-grade fever and a recent history of a viral upper respiratory tract infection. An ECG shows diffuse ST elevation. A diagnosis of acute pericarditis is made. Which of the following layers of the heart is primarily involved in this condition? 

Question 2 of 5

3. A cardiac surgeon is planning to perform coronary artery bypass grafting on a patient with severe three-vessel coronary artery disease. Understanding the blood supply to the heart is crucial for identifying potential graft sites. Which of the following arteries primarily supplies blood to the sinoatrial (SA) node in most individuals? 

Question 3 of 5

4. During a study session, medical students are discussing the clinical significance of the pericardial cavity. One student asks about the potential consequences of an excessive accumulation of fluid in this space. Which of the following conditions is directly caused by such an accumulation, leading to decreased cardiac output? 

Question 4 of 5

5. A 45-year-old man with a known history of coronary artery disease presents to the clinic complaining of episodes of chest pain on exertion. His symptoms are relieved by rest. Angiography shows significant stenosis of the artery that supplies the anterior wall and anterior septum of the left ventricle. Which of the following arteries is most likely affected in this patient? 

Question 5 of 5


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