Five year follow-up of double Master's test, maximal treadmill stress test, and resting and postexercise apexcardiogram in asymptomatic persons.

The double Master's test, the maximal treadmill stress test, the resting apexcardiogram, and the postexercise apexcardiogram significantly correlated with the development of subsequent coronary heart disease within five years in 100 asymptomatic persons. The maximal treadmill stress test correlated better than the double Master's test in predicting subsequent coronary heart disease. The presence of both an abnormal maximal treadmill stress and an abnormal a-wave ratio in the postexercise apexcardiogram had the best value in predicting subsequent coronary heart disease.