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An infant presents with their upper trunk, arms and head being pink but the lower extremities are cyanotic. What lesion could cause this?

A 72 year old diabetic, hypertensive man (ex-smoker) presents with a history of crushing substernal chest pain 5 days ago, that has now resolved. His cardiac troponin T is 0.2 ng/mL (reference interval:

Which one of the following agents would NOT move the Frank-Starling curve from curve A to B in a person with heart failure?

For which one of the following drugs is the major mechanism of the anti-angina effect a decrease in ventricular preload?

A patient develops ringing in their ears and headache. Which class I anti-arrhythmic are they taking?

A 69 yo man with a 100 pack-year history of smoking, hypertension, diabetes, and hypercholesterolemia presents with new-onset chest pain that occurs at rest and while walking up stairs. His cardiac troponin test is not elevated (a.k.a., within the normal range) and his EKG at rest is normal. What is the correct diagnosis?

An 80 year old man has not seen a doctor in 15 years.. He has recently had trouble sleeping and since his previous physician retired several years ago, he identified a physician in town that is accepting new patients. Upon physical examination, blood pressure is 160/80 mm Hg, heart rate is 70 beats/min, and respiratory rate is 14 breathes/min. The patient has never been treated for hypertension and recalls no previous blood pressure concerns. What is the most likely cause of the hypertension in this patient?

An adult with pulmonary hypertension complains of edema in their lower extremities. Their physical examination reveals pathologically increased JVD (jugular venous distention) and hepatomegaly. The patient does not complain of cough or shortness of breath. Their lungs are clear to auscultation. What do you conclude?

What ECG lead primarily registers cardiac electrical vectors moving toward the feet?

What is the terminology for the valvular lesions seen in this image, taken from a lupus patient?