Bizath Taqui, MD

A 29-year-old man presents with a recent episode of light-headedness of sudden onset. Although he denies associated loss of consciousness, witnesses report that he was briefly unresponsive to verbal stimuli. He also denies chest pain, dyspnea, palpitations, and diaphoresis; he is currently asymptomatic.

A 29-year-old man presents with a recent episode of light-headedness of sudden onset. Although he denies associated loss of consciousness, witnesses report that he was briefly unresponsive to verbal stimuli. He also denies chest pain, dyspnea, palpitations, and diaphoresis; he is currently asymptomatic.

A 64-year-old woman presents with persistent, progressively worsening chest pain and dyspnea of 1 month's duration. She also reports orthopnea, bilateral leg swelling, and weight gain. She denies any history of similar symptoms.

A 64-year-old woman presents with persistent, progressively worsening chest pain and dyspnea of 1 month's duration. She also reports orthopnea, bilateral leg swelling, and weight gain. She denies any history of similar symptoms.

A 22-year-old woman presents with progressive fatigue and dyspnea on exertion that develops after she walks about 30 feet. She also reports orthopnea, lower extremity swelling, weight gain, dry cough, and paroxysmal nocturnal dyspnea.