A 16-year-old boy is brought to the emergency department 20 minutes after collapsing while playing basketball. There is no personal or family history of serious illness. On arrival, there is no palpable pulse and no respiratory effort is seen. Blood pressure is 125/75 mm Hg and pulse is 55/min. Transthoracic echocardiogram results are as follows: The right ventricle appears normal and there are no valvular lesions. Which of the following best explains this patient's echocardiogram findings?

Question

A 16-year-old boy is brought to the emergency department 20 minutes after collapsing while playing basketball. There is no personal or family history of serious illness. On arrival, there is no palpable pulse and no respiratory effort is seen.  Blood pressure is 125/75 mm Hg and pulse is 55/min.  Transthoracic echocardiogram results are as follows:  The right ventricle appears normal and there are no valvular lesions.  Which of the following best explains this patient's echocardiogram findings?

Quizplus · Accepted Answer

Eductional Objective: Patients with hypertrophic cardiomyopathy (HCM) may be asymptomatic and often have a family history of HCM or sudden cardiac death.  Findings consistent with HCM include an overall increase in left ventricular (LV) mass, reduced LV cavity size with impaired diastolic function, LV hypertrophy predominantly affecting the septum, and normal or increased LV ejection fraction.

A 16-Year-Old Boy Is Brought to the Emergency Department 20