Managing the post-myocardial infarction patient with asymptomatic left ventricular dysfunction.
The percentage of post-myocardial infarction (MI) patients with asymptomatic left ventricular dysfunction (ALVD) is now estimated at 10%, and that number is expected to grow as reperfusion procedures increasingly become routine. Since average all-cause mortality risk in these patients is high (up to 27%), definitive diagnostics are recommended to screen all post-MI patients for ALVD, defined as left ventricular systolic dysfunction in the absence of heart failure symptoms. Post-MI management strategies for patients with ALVD target the two routes of progression to heart failure: (1) cardiac remodeling mediated by neurohormonal activation, and (2) continued and recurrent myocardial ischemic events. Clinical trials of neurohormonal antagonists in post-MI ALVD patients have shown that angiotensin-converting enzyme inhibitors attenuate left ventircular remodeling and that beta-blocker therapy reverses remodeling for patients already on angiotensin-converting enzyme inhibitor therapy. Neurohormonal antagonist therapy is also associated with significant reductions in sudden death in post-MI ALVD patients.
Philippides
George J
GJ
Department of Clinical Cardiology, Boston University School of Medicine, Coronary Care Unit, Boston Medical Center, Boston, MA 02118, USA. George.Philippides@bmc.org
D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use; D047228:Angiotensin II Type 1 Receptor Blockers / Q000627:therapeutic use; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000627:therapeutic use; D003324:Coronary Artery Disease / Q000209:etiology; D017147:Defibrillators, Implantable; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000627:therapeutic use; D000451:Mineralocorticoid Receptor Antagonists / Q000627:therapeutic use; D009203:Myocardial Infarction / Q000503:physiopathology*; D012307:Risk Factors; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology / Q000628:therapy*
D000319:Adrenergic beta-Antagonists; D047228:Angiotensin II Type 1 Receptor Blockers; D000806:Angiotensin-Converting Enzyme Inhibitors; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D000451:Mineralocorticoid Receptor Antagonists