Journal of the American College of Cardiology
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J. Am. Coll. Cardiol. · Jun 1999
Comparative StudyThe significance of stress-induced ST segment depression in patients with inferior Q wave myocardial infarction.
This study was conducted to evaluate the relationship between ST segment depression (STD) during dobutamine stress tests in different electrocardiogram (ECG) leads and myocardial ischemia assessed by simultaneous single photon emission computed tomography (SPECT) imaging in patients with inferior Q wave myocardial infarction. ⋯ In patients with inferior Q wave myocardial infarction, stress-induced STD in high lateral leads should be recognized as a reciprocal change for ST elevation in the inferior leads, and therefore, should be interpreted with the consideration of the significance of ST elevation if present, rather than being indicative of myocardial ischemia on its own. The STD found in the anterior leads appears to be a sign of myocardial ischemia. These findings should be considered in the definition of a positive ECG stress test and in establishing the criteria for the termination of stress test.
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J. Am. Coll. Cardiol. · Jun 1999
Comparative StudyImmediate exercise testing of low risk patients with known coronary artery disease presenting to the emergency department with chest pain.
The purpose of this study was to demonstrate the safety and utility of immediate exercise treadmill testing (IETT) of low risk patients presenting to the emergency department with known coronary artery disease (CAD). ⋯ Immediate exercise treadmill testing of low risk patients with chest pain and known CAD is effective in further stratifying this group into patients who can be safely discharged and those who require hospital admission.
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J. Am. Coll. Cardiol. · May 1999
Survival after cardiac arrest or sustained ventricular tachycardia in patients with hypertrophic cardiomyopathy.
The aim of this study was to evaluate the survival of patients with hypertrophic cardiomyopathy (HCM) after resuscitated ventricular fibrillation or syncopal sustained ventricular tachycardia (VT/VF) when treated with low dose amiodarone or implantable cardioverter defibrillators (ICDs). ⋯ This study shows that patients with HCM who survive an episode of VT/VF remain at risk for a recurrent event. Implantable cardioverter defibrillator therapy appears to offer the best potential benefit regarding outcome.
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J. Am. Coll. Cardiol. · May 1999
Troponin-I for prediction of early postoperative course after pediatric cardiac surgery.
It was the aim of the study to test the prognostic value of cardiac troponin-I (cTnI) concerning the early postoperative course after pediatric cardiac surgery. ⋯ Cardiac troponin-I serum levels after open heart surgery in children and infants 4 h after admission to the ICU allowed anticipation of the postoperative course and correlated with the incidence of significant postoperative complications.
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J. Am. Coll. Cardiol. · May 1999
Pregnancy among women with congenitally corrected transposition of great arteries.
The outcome of pregnancy in congenitally corrected transposition of the great vessels was studied in 22 women. ⋯ Successful pregnancy can be achieved in most women with congenitally corrected transposition of the great arteries. The rate of fetal loss and maternal cardiovascular morbidity is increased. Because of the small number of births, the risk of congenital heart disease in offspring of women with congenitally corrected transposition of the great arteries is uncertain.