Which action potential has the longest refractory period and what is the identity of such cells?

A kidney biopsy reveals hyperplastic arteriolosclerosis. What condition is this histologic finding most indicative of?

A 72-year-old female with no significant past medical history passes out while exercising. She has intermittent exertional chest pains and dyspnea on exertion as well. Her physical examination reveals a III/VI late-peaking crescendo-decrescendo murmur at the right upper sternal border and a III/VI holosystolic murmur at the apex. Her S2 heart sound is very soft and her carotid upstroke is weak and delayed. Which of the following is most likely causing her symptoms?

A 41 year old woman is an office worker with a sedentary life style.. She presents at the UF Health Family Medicine clinic for a yearly physical examination. She is 5’5h tall and weighs 202 pounds. Blood pressure is 150/110 mm Hg, heart rate is 82 beats/min, and respiratory rate is 18 breaths/min. The most likely cause of the increased systolic blood pressure is

A normal heart is on the right. Which one of the following disorders is the most likely cause of the diseased heart on the left?

A teenage boy presents with a dilated cardiomyopathy. His male cousin on his mother’s side of the family is similarly affected. His cousin’s mother is the sister of the patient’s mother. What is the cause of the patient’s cardiomyopathy?

A patient with a systolic crescendo-decrescendo murmur undergoes cardiac catheterization. The peak LV pressure is 160 mmHg. The patient’s diastolic BP is 100 mmHg and their mean arterial pressure is 110 mmHg. What is the gradient across the aortic valve (in mm Hg)?

How is the distinction between subendocardial and transmural infarction made?

What does a delta wave represent on an ECG?

A 19 year woman with no prior medical history of disease has the ECG tracing displayed following an episode of syncope. What is the most likely explanation for her syncope?