Five—year mortality and coronary heart disease development after normal coronary angiogram.docVIP

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Five—year mortality and coronary heart disease development after normal coronary angiogram.doc

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Five—year mortality and coronary heart disease development after normal coronary angiogram

Five—year mortality and coronary heart disease development after normal coronary angiogram BACKGROUND： Previous studies depict low cardiac event and mortality rates in patients with angiographically normal coronary arteries. These studies， however， are limited by small sample sizes， short follow-up intervals， and selection biases. This study was undertaken to determine the natural five-year course of a diverse cohort of subjects with documented normal coronary arteries with respect to coronary heart disease development， revascularization need， and all-cause mortality. METHODS： Consecutive adult patients with angiographically normal coronary arteries were followed up for 5 years through medical record review. Patients with any degree of angiographic abnormality， including minimal luminal irregularity or non-critical stenosis， were excluded. Patients were not excluded based on age， co-morbidities （except cardiac transplant and structural heart disease）， indication for angiogram， or initial hospitalization status. RESULTS： Normal coronary arteries were found in 182 （31.3%） of 582 patients； 129 met all inclusion criteria. The mean age was （49.1±12.5） years； 47 （36.7%） were male and 75 （58.1%） were caucasian. The most common indication for angiography was cumulative risk factors （60.5%）. Within 5 years of a normal angiogram， 13 of 129 patients died （10.1%； 95 CI 5.7%-16.9%）. Six （40%； 95 CI 19.8% to 64.3%） of 15 patients undergoing repeat angiogram within five years developed new coronary heart disease， with one requiring revascularization. Of traditional risk factors of coronary heart disease， only diabetes was associated with a higher risk of death. CONCLUSION： The natural five-year course of a diverse cohort of patients with documented normal coronary arteries suggests that there is significant risk for death and development of coronary heart disease. KEY WORDS： Angiography； Coronary disease； Mortality； Prognosis World J Emerg Med 2011；2（1）：24-29 I