Hypertension and nephrology

[Hypertension and left ventricular hypertrophy]

MATOLTSY András

SEPTEMBER 10, 2016

Hypertension and nephrology - 2016;20(04)

[Left ventricular hypertrophy (LVH) is defined as an increase in the mass of the left ventricle. In addition to the absolute increase in mass, the geometric pattern of LVH also may be important. LVH can be secondary to an increase in wall thickness, an increase in cavity size, or both. LVH as a consequence of hypertension usually presents with an increase in wall thickness. This increase in mass predominantly results from a chronic increase in afterload of LV caused by the hypertension, although there is also a genetic component. A significant increase in the number and/or size of sarcomeres is the main pathologic mechanism, but hypertension may also result in interstitial fibrosis. The estimation of mass is commonly derived from measurements obtained by echocardiography. LVH is associated with increased incidence of systolic and/or diastolic dysfunction, heart failure, myocardial infarction, ventricular arrhythmias, sudden cardiac death, aortic root dilatation, and a cerebrovascular event. The cardiovascular risk is directly related to the degree of mass. The regression of LVH is associated with a reduction in cardiovascular risk and improved cardiac function. Regression of LVH is associated with weight loss, dietary sodium restriction, and use of ACE inhibitors, ARBs, some calcium channel blockers, and some sympatholytic agents.]

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[Around 57% of Hungarian hypertensive patients did not reach the goal blood pressure. According to a paper in 2011, the prevalence of resistant hypertension is 2.9-43%. Analyzing only the therapy of hypertensive patients of an Hypertension Outpatient Clinic of the University of Szeged authors wanted to answer these main questions. How many patients were therapeutically resistant by definition? How many patients were taking 3 or more antihypertensive drugs? How many of these patients reached the goal systolis blood pressure values? How many fold drug combinations were used generally? Data were retrospectively collected from 01/01/2011 to 31/08/2011 from the electronic files of the hypertensive patients. Altogether 310 patients’ data were analyzed, of all cases only one visit. If someone returned more times during this period, only the first visit was considered. Means of two measurements were calculated. The goal SBP was 140/ mm Hg. By the definition 234/310 (76%) patients had resistant hypertension in this population (158±17/97±8 mm Hg). Three or more antihypertensive drugs were taken by 257/310 (83%) patients (136±20 mm Hg) and 134 of them (52% of 257 patients) reached the goal. A fourfold combination of antihypertensive agents was the most frequent in this population. It is advised to use multiple drug combinations to reach the goal blood pressure and it is recommended to spend enough but not longer than necessary time to find the most effective combination in every case. In resistant cases it is always necessary to investigate the background of it.]

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