RESUMO
INTRODUCTION: A family history of hypertension puts young adults at a higher risk of developing hypertension, that too, at an earlier age than their parents. Recent studies suggest that the baroreflex mechanism, which takes care of the short-term regulation of blood pressure (BP), also plays a role in the long-term regulation of BP. Studies have reported decreased baroreflex sensitivity (BRS) in hypertensives. Reduced BRS is shown to herald the future occurrence of cardiovascular diseases (CVD) and helps in risk stratification AIM: To assess BRS at rest and during the Valsalva maneuver among apparently healthy male offspring (age 18-35 years) of hypertensive patients. METHODS: We recruited 37 participants whose parents (either/both) were hypertensive in the study group and whose parents (both) were not hypertensive in the control group. We measured basic anthropometric parameters (height, weight, waist circumference), cardiovascular parameters (heart rate and BP), short-term heart rate variability, and BRS (at rest and during Valsalva). RESULTS: We found that BRS at rest and BRS during the Valsalva maneuver were reduced among healthy male offspring of hypertensive parents than in healthy male offspring of non-hypertensive parents. Further, HRV indices and Valsalva ratio showed a sympathovagal imbalance in the form of decreased vagal and increased sympathetic activity. CONCLUSION: The reduced BRS and sympathovagal imbalance in male offspring of hypertensive parents reveal the early risk of developing hypertension in the future.