Hypertension and ischemic heart disease

AbstractHypertension is one of the major risk factors for ischemic heart disease and appropriate control of blood pressure is the cornerstone of both primary and secondary ischemic heart disease prevention. Effective blood pressure (BP) control is recommended in primary prevention, i.e., maintaining blood pressure <140/90mmHg, while in secondary prevention values <130/85mmHg used to be recommended. Treatment of hypertension in patients with ischemic heart disease is based on ACE inhibitors and/or AII antagonists (trials HOPE, EUROPA, and PEACE) in combination with beta blockers or with verapamil if beta blockers are not tolerated.According to epidemiologic data, cardiovascular mortality increases with blood pressure, starting as low as from the 110/70mmHg level. Czech, European, and American guidelines from the early 21st century recommend that blood pressure in patients with ischemic heart disease (IHD) be maintained below 130/80mmHg. Data from the INVEST a ACCORD trials led, however, to reappraisal of these strict recommendations and the blood pressure values currently recommended in secondary prevention correspond to high-normal blood pressure, i.e., 130–139mmHg/80–89mmHg.INVEST is the largest clinical trial that focused on hypertonic patients with IHD. Its results showed that verapamil is an appropriate alternative to beta blockers and that while lowering of blood pressure below 140/90mmHg is necessary, its further decrease below 130/80mmHg is not associated with any additional benefit.Trials with beta blockers demonstrated that lowering of heart rate (HR) improves the patients' prognosis. This hypothesis was definitely verified by trials BEAUTIFUL a SHIFT. The recommended heart rate for patients in secondary prevention is 50–70bpm

Effects of serelaxin in patients with acute heart failure

Background: Serelaxin is a recombinant form of human relaxin-2, a vasodilator hormone that contributes to cardiovascular and renal adaptations during pregnancy. Previous studies have suggested that treatment with serelaxin may result in relief of symptoms and in better outcomes in patients with acute heart failure. Methods: In this multicenter, double-blind, placebo-controlled, event-driven trial, we enrolled patients who were hospitalized for acute heart failure and had dyspnea, vascular congestion on chest radiography, increased plasma concentrations of natriuretic peptides, mild-to-moderate renal insufficiency, and a systolic blood pressure of at least 125 mm Hg, and we randomly assigned them within 16 hours after presentation to receive either a 48-hour intravenous infusion of serelaxin (30 μg per kilogram of body weight per day) or placebo, in addition to standard care. The two primary end points were death from cardiovascular causes at 180 days and worsening heart failure at 5 days. Results: A total of 6545 patients were included in the intention-to-treat analysis. At day 180, death from cardiovascular causes had occurred in 285 of the 3274 patients (8.7%) in the serelaxin group and in 290 of the 3271 patients (8.9%) in the placebo group (hazard ratio, 0.98; 95% confidence interval [CI], 0.83 to 1.15; P=0.77). At day 5, worsening heart failure had occurred in 227 patients (6.9%) in the serelaxin group and in 252 (7.7%) in the placebo group (hazard ratio, 0.89; 95% CI, 0.75 to 1.07; P=0.19). There were no significant differences between the groups in the incidence of death from any cause at 180 days, the incidence of death from cardiovascular causes or rehospitalization for heart failure or renal failure at 180 days, or the length of the index hospital stay. The incidence of adverse events was similar in the two groups. Conclusions: In this trial involving patients who were hospitalized for acute heart failure, an infusion of serelaxin did not result in a lower incidence of death from cardiovascular causes at 180 days or worsening heart failure at 5 days than placebo. (Funded by Novartis Pharma; RELAX-AHF-2 ClinicalTrials.gov number, NCT01870778. opens in new tab.