Angina: identifying and managing
the patient at risk |
Stable angina, the most prevalent manifestation of
coronary artery disease (CAD), has been underresearched,
partly because it excites less interest among
cardiologists than the more acute manifestations of
CAD—where progress has been nothing less than
brilliant—and partly because it is difficult to conduct
studies sufficiently powered to demonstrate significant
prognostic benefit in a population whose overall
annual mortality rate is 1% - 3%. Whether nitrates
improve prognosis, for example, is still unknown. Yet,
stable angina offers a perfect window of opportunity
for identifying those exposed to future events and for
developing novel therapies such as plaque-stabilizing
drugs. At the entry level of the workup pyramid, simple
clinical assessment aided by the ankle-brachial index
remains as accurate as any measure or combination
of measures yet devised. At the highest level, angiography
supplemented by plaque studies using magnetic
resonance angiography is a candidate gatekeeper
to revascularization. Bypass has definite prognostic
benefit in many well-selected patients. Tailoring a
management plan to optimize event-free survival in
the individual patient requires awareness of the precise
prognostic impact, in both the overall angina
population and specific groups, of lifestyle, prophylaxis
(aspirin, statins, and, increasingly, angiotensinconverting
enzyme inhibitors), specific antianginal
drug therapy, and invasive intervention...
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