INTRODUCTIONHigh blood pressure is more prevalent in the general population. Hypertension significantly contributes to cardiovascular (CV) morbidity and mortality by causing substantial structural and functional adaptations, including diastolic dysfunction (DD), left ventricular hypertrophy (LVH), ventricular and vascular stiffness. Chronic hypertension is the most common cause of diastolic dysfunction and failure. Abnormalities of ventricular relaxation and the consequences of diastolic dysfunction may signify myocardial end-organ damage in patients who have hypertension which precede ventricular hypertrophy.
1,2Isolated diastolic dysfunction is impairment of isovolumetric ventricular relaxation and decreased compliance of the left ventricle. Symptomatic diastolic dysfunction is called diastolic heart failure. With diastolic dysfunction, heart meets the body's metabolic needs, whether at rest or during exercise, but at a higher filling pressure's. With mild dysfunction, late filling increases ABSTRACT Background: Heart failure is one of the most common causes of cardiovascular morbidity along with mortality and hypertension is the most common cause of cardiac failure. Recent studies have shown that isolated diastolic dysfunction very often accompanies hypertensive heart disease. Aims: The present study was conducted to identify the risk of cardiac failure in hypertensive individuals by evaluating diastolic function using mitral inflow velocities of echocardiography. Methods: Subjects attending cardiology outpatient department for master health check up with age between 25 to 80 years were selected. The procedure was explained and consent was obtained from the subjects. All the subjects underwent a detailed clinical examination. Height, weight and blood pressure of the subjects was measured and BMI was calculated. Two-dimensional Doppler echocardiographic examinations were performed with an ultrasonographic system (Philips iE 133 Echo Doppler). The student t test, chi square test and logistic regression analysis were used to find the influence of ejection fraction and heart rate on diastolic function. Results: The trans-mitral inflow parameters on Doppler echocardiography such as E wave deceleration time (DT), isovolumetric relaxation time (IVRT) and early to late transmitral peak flow velocities ratio (E/A) were significantly different in hypertensive subjects on treatment having normal ejection fraction, when compared to normotensive subjects. We observed a decrease in E/A ratio and increase in DT, IVRT with hypertension. Conclusions: From the present study it can be concluded that hypertension is significantly associated with diastolic dysfunction of heart, even in subjects with normal systolic function.