PATH 132 Sample MCQs in Cardiovascular System- St. George's University

PATH 132 Sample MCQs in Cardiovascular System- St. George's University SAMPLE MULTIPLE CHOICE QUESTIONS IN CARDIOVASCULAR SYSTEM 1. During cardiac catheterization of a 4-year-old boy, the radiologist notes that the contrast medium injected into the arch of aorta flows into the pulmonary artery. What congenital defect is most likely in this boy? A. Ventricular septal defect B. Atrial septal defect C. Tetralogy of Fallot D. Patent ductus arteriosus E. Coarctation of aorta 2. Auscultation of the chest of the boy in que# 1 would reveal what type of murmur? A. Early systolic murmur B. Late systolic murmur C. Pansystolic murmur D. Diastolic murmur E. Continuous murmur 3. A 37-year-old woman comes to the emergency department because of dyspnea of 2- day duration. She is diagnosed to have mitral stenosis of rheumatic etiology 5 years ago. Physical examination reveals irregularly irregular pulse, prominent neck veins, a mid-diastolic murmur and a right ventricular heave. Transesophageal echocardiography indicates severe mitral stenosis. She is suspected to have developed atrial fibrillation as a complication. What is the most likely cause for an irregularly irregular pulse in this patient? A. Rapid impulse generation from SA node B. Rapid impulse generation from AV node C. Abnormal conduction through AV node to ventricles D. Abnormal conduction in the Purkinje fibers E. Irregularity in spreading of impulse across the atria 4. What is the normal pacemaker of human heart? A. Sinoatrial node B. Atrioventricular node C. Bundle of His D. Right atrium E. Interatrial septum 5. A 67-year-old man with a 10-year history of type 2 diabetes mellitus is brought to the emergency department because of severe chest pain. His blood chemistry and EKG suggests an acute, transmural myocardial infarction of the inferior wall. What coronary artery is most likely occluded in this patient? A. Left coronary artery B. Right coronary artery C. Left circumflex artery D. Septal branch of LAD E. Left anterior descending artery 6. Blood chemistry of the serum lipoproteins of a 62-year-old woman with arteriosclerosis would most likely show which of the following lipid profile? A. High HDL and low LDL B. High LDL and low HDL C. High HDL and normal LDL D. High LDL and normal HDL E. Both LDL and HDL are high 7. A 59-year-old man with a 5-year history of coronary artery disease is diagnosed to have congestive heart failure. Physical examination reveals bilateral ankle edema and bilateral basal rales. Data obtained from cardiac lab are given below: Mean pulmonary arterial pressure = 42 mm Hg (normal: 15 mm Hg) Left atrial pressure = 22 mm Hg (normal: 8 mm Hg) Cardiac output = 4 Liters/min. Calculate the pulmonary vascular resistance in this patient? A. 2 mmHg/L/min. B. 4 mmHg/L/min. A. 5 mmHg/L/min. A. 10 mmHg/L/min. A. 0.5 mmHg/L/min. 8. Based on the above data, the patient in que#7 would be having hypertrophy of which of the following? A. Right atrium B. Left atrium C. Right ventricle D. Left ventricle E. Right and left atria 9. Physical examination of the patient in que#7 would most likely reveal a loud second heart sound heard best in what auscultatory area? A. Second intercostal space on the right sternal margin B. Third intercostal space on the left sternal margin A. Fifth intercostal space on the left sternal margin A. Fifth intercostal space just medial to the apex A. Second intercostal space on the left sternal margin 10. Left ventricular pressure-volume loop of a 26-year-old healthy man is shown in the figure below. What event occurs at the point labeled with the alphabet, D?