| Abstract: | AIM: To study relationship between coronary reserve and left ventricular geometry. METHOD AND MATERIAL: Transesophageal cardiac pacing was carried out in 53 patients with hypertensive disease. Thirty five patients (66%) had left ventricular hypertrophy which was eccentric in 16 and concentric in 19. RESULTS: Myocardial ischemia was induced during pacing in 79.2% of patients; it was painful in 45.2 and painless -- in 54.8% of patients. Test with esophageal pacing was positive in 91.4 and 55.6% of patients with and without left ventricular hypertrophy, respectively. In patients with concentric hypertrophy frequency of positive tests was higher and level of coronary reserve lower than in patients with eccentric left ventricular hypertrophy. There was negative correlation between pacing rate at myocardial ischemia induction and left ventricular myocardial mass index. Painless ischemia was more frequent among patients with left ventricular hypertrophy. Twelve of 42 patients (28.3%) with positive result of pacing had no clinical signs of ischemic heart disease. CONCLUSION: Left ventricular hypertrophy limits coronary reserve, increases prevalence of painless myocardial ischemia. Transesophageal pacing enables detection of preclinical signs of lowered coronary reserve. |
