Active clinical trials for "Heart Diseases"

To evaluate whether the long-term use of oral contraceptives, after discontinuation, was associated with an increased incidence of first nonfatal myocardial infarction among women above the age of 50.

To conduct a 25-year follow-up of the surviving participants in the Western Collaborative Group Study, the first large prospective study of coronary heart disease risk factors to incorporate direct assessment of Type A behavior.

To determine if low dietary calcium intake and disturbances in maternal calcium metabolism were associated with increases in blood pressure in late pregnancy.

To conduct a five-year follow-up of the population of Gubbio, a town in north central Italy, in order to determine the relationship of baseline sodium-stimulated lithium countertransport to subsequent change in blood pressure and incidence of hypertension.

To screen by electrocardiography the entire population of 1,400 individuals in seven Amish Mennonite communities in order to perform genetic linkage studies of long QT syndrome (LQTS).

To determine genetic mechanisms responsible for congenital cardiovascular malformations.

To investigate the mechanisms of white coat hypertension and study it further as a risk factor for heart damage.

To establish and maintain a national registry of children with different forms of cardiomyopathy.

To assess the diagnostic and prognostic usefulness of serum markers of left ventricular remodeling for predicting congestive heart failure.

To examine trends in trans-fatty acid intake by using newly available nutrient data to recalculate 24 dietary recalls from the Minnesota Heart Survey.