A seventeen-year-old competitive basketball player presents…
A seventeen-year-old competitive basketball player presents for a pre-participation sports physical. He reports one brief episode of loss of consciousness during intense practice last month that was preceded by chest tightness and palpitations. He recovered within minutes and did not seek care. On examination today, his vital signs are normal, and no murmur is heard at rest. Which diagnostic test is the most appropriate initial study in primary care to further evaluate his risk for sudden cardiac death during exercise?