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"nephropathy"

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Macrovascular and Microvascular Long-Term Clinical Outcomes of Diabetes

Comparative Effectiveness and Safety in Subpopulations

Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II-receptor blockers (ARBs) are proven therapies that reduce morbidity and mortality in patients with left ventricular systolic dysfunction (LVSD) with chronic heart failure, and have also shown to reduce the progression of nephropathy in patients with diabetes mellitus and proteinuria. It is less clear how ACEIs contribute to the reduction of cardiovascular events in patients with stable IHD who also have preserved left ventricular systolic function (LVSF), as determined by a left ventricular ejection fraction (LVEF) >40%. These patients have relatively intact LVSF, yet may present with chest pain (angina pectoris) brought on by emotional or physical stress. These symptoms are usually due to one or more clogged or diseased arteries that result in reduced blood flow and oxygen supply to the heart. Therapies shown to reduce the risk for cardiovascular events in IHD patients include aspirin, statins, beta-blockers, and dual anti-platelet therapy. Other agents used for symptomatic relief include nitrates and calcium channel blockers (CCB). A revascularization procedure to circumvent or treat a blocked vessel is another therapeutic option for patients unresponsive or intolerant to these medications. A patient will need prolonged treatment with these medications to reduce anginal symptoms, increase quality of life, and reduce the risk of fatal and nonfatal cardiovascular events. A comparative effectiveness review was conducted to synthesize the evidence surrounding the additional cardiovascular benefits from adding ACEIs and/or ARB therapy to the long-term care regimens of stable IHD patients with intact LVSF, and if those benefits outweigh the potential side effects of these drugs. This case study will seek to evaluate ACEIs and/or ARBs in stable ischemic heart disease patients with preserved LVSF.
Pharmacologic Effects of Antagonists on the Renin-Angiotensin-Aldosterone System
Despite standard therapy, patients with stable ischemic heart disease and preserved left ventricular systolic function continue to be at risk for future cardiovascular events. This slide represents several pathways involved in the Renin-Angiotensin-Aldosterone System (RAAS), which is critical for regulating blood pressure, electrolyte balance, and fluid volume homeostasis and plays a pivotal role in the pathogenesis of hypertension, congestive heart failure, and diabetic nephropathy. Pharmacological antagonists of this system include angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II-receptor blockers (ARBs). These drugs block adverse effects of the RAAS by blocking the activity of angiotensin II through different mechanisms as shown in the slide: ACEIs act on the RAAS by blocking the conversion of angiotensin I into angiotensin II and inhibiting the breakdown of bradykinin, which is a potent vasodilator. ARBs block the angiotensin II type-1 receptor and reduce the pharmacologic effects of angiotensin II, regardless of whether angiotensin II is created by the angiotensin-converting enzyme or by pathways independent of this enzyme.

Pharmacologic Effects of Antagonists on the Renin-Angiotensin-Aldosterone System

Clinical Questions Addressed by the Comparative Effectiveness Review (2 of 2)