Question

question 45 (mandatory) (2 points)
listen
a 44 - year - old previously healthy male has experienced worsening exercise tolerance accompanied by marked shortness of breath for the past 6 months. a chest radiograph shows an enlarged heart and pulmonary congestion. an echocardiogram shows four - chamber cardiac dilation and demonstrates mitral and tricuspid valvular regurgitation. a coronary angiogram demonstrates no more than 10% narrowing of the major coronary arteries. the underlying condition that is most likely to be present in this patient is:
essential hypertension
myocardial hemochromatosis
congestive heart failure
idiopathic congestive cardiomyopathy

Explanation:

• Essential Hypertension: Usually causes left - ventricular hypertrophy rather than four - chamber dilation.
• Myocardial Hemochromatosis: Is a less common cause compared to the other options and has specific pathological iron - deposition features not indicated here.
• Congestive Heart Failure: Is a consequence rather than the underlying condition in this context.
• Idiopathic Congestive Cardiomyopathy: Characterized by four - chamber cardiac dilation (as seen in the echocardiogram), valvular regurgitation (mitral and tricuspid), and no significant coronary artery narrowing (as per the coronary angiogram).

Answer:

Idiopathic Congestive Cardiomyopathy