Family history of myocardial infarction and hemodynamic responses to exercise in young black boys
F. A. Treiber, W. B. Strong, F. W. Arensman, T. Forrest, H. Davis and L. Musante
Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta.
The influence of family history of coronary artery disease on children's
hemodynamic responses to exercise was examined with 25 black boys aged 7 to
10 years. Blood pressure, heart rate, cardiac output, stroke volume, and
total peripheral resistance were evaluated during preexercise, peak
exercise, and recovery stages. Children with a family history of CAD
exhibited greater systolic blood pressure and total peripheral resistance
during preexercise and peak exercise stages than did those without a family
history of coronary artery disease. After controlling for preexercise
differences, the group with a family history of coronary artery disease
exhibited greater increases in systolic blood pressure and less attenuation
of total peripheral resistance to peak exercise than the group without a
family history of coronary artery disease. Cardiac output indexed by body
surface area and stroke volumes were higher at all times in the group
without a family history compared with the group with a family history of
coronary artery disease. Findings are compared with those of adult studies
in terms of influence of family history of coronary artery disease on
cardiovascular reactivity to stress.
