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Which one of the following developmental processes brings the bilaterally paired endocardial tubes into the future pericardial cavity?

Which one of the following drugs reduces the effective refractory period?

A patient presents with the following physical findings; There is a high-pitched decrescendo murmur which begins with the second heart sound (S2) and lasts through some or all of diastole. What pathology is present?

What is not a usual adverse effect of digoxin?

Which one of the following congenital heart defects typically does NOT produce increased pulmonary arterial blood flow?

Which one of the following factors that predisposes to atherosclerosis, is not modifiable?

If two successive QRS complexes are 600 milliseconds apart, what is the heart rate?

With no baroreceptor, which of the following will occur in response to major blood loss?

A 56 year old woman with a history of asthma is diagnosed with hypertension. Laboratory studies reveal a creatinine of 3.0 mg/dL and a potassium level of 5.6 mg/dL. Which of the following medications is appropriate to treat her hypertension?

Infected endocarditis vegetations have which one of the following characteristics?