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Management of patients with chronic stable angina at low risk for serious cardiac events
1Cardiovascular Department, University of Oklahoma-HSC, Oklahoma City 73104, USA.
Insights
For chronic stable angina, low-risk patients benefit most from medical management, including aspirin and risk factor modification. Revascularization offers no advantage over medical therapy for these individuals.
Area of Science:
- Cardiology
- Internal Medicine
- Pharmacology
Background:
- Chronic stable angina management hinges on accurate risk stratification for future coronary events.
- Low-risk patients have a favorable prognosis, with medical management proving as effective as revascularization procedures.
Purpose of the Study:
- To outline optimal management strategies for chronic stable angina.
- To emphasize risk stratification and the role of medical therapy in low-risk patients.
Main Methods:
- Review of established guidelines and clinical evidence for chronic stable angina management.
- Analysis of therapeutic benefits of aspirin, risk factor modification, and anti-anginal medications.
Main Results:
- Medical therapy, including aspirin and risk factor modification (e.g., blood pressure control, cholesterol lowering, smoking cessation), is the primary approach for low-risk patients.
- Nitrates, beta-blockers, and calcium channel antagonists are effective first-line monotherapies for symptom control.
- Combination therapy is considered only after optimal monotherapy fails; revascularization is reserved for refractory cases.
Conclusions:
- Risk stratification is crucial for guiding treatment decisions in chronic stable angina.
- Medical management, focusing on aspirin, risk factor modification, and symptom relief, is the cornerstone of treatment for most patients.
- Revascularization should be reserved for patients unresponsive to comprehensive medical therapy.
Abstract:
Successful management of the patient with chronic stable angina requires correct stratification by assessing the risk of future coronary events. Patients at low risk for such events have a relatively good prognosis; revascularization procedures (balloon angioplasty or surgery) offer no benefit over medical management. Such patients should be offered medical therapy as their first option. The goals in management of chronic stable angina are (1) treatment of other conditions that may worsen angina; (2) treatment with aspirin and modification of risk factors for coronary artery disease (CAD) to improve outcome; and (3) effective relief of anginal symptoms. Most patients with stable angina will have CAD. It is well established that treatment with aspirin and modification of risk factors for CAD are beneficial in reducing cardiovascular mortality and morbidity. Blood pressure reduction, lowering of blood cholesterol level, and smoking cessation are interventions of proven value and appear to correct defects (at least partially) in the endothelial function of the coronary blood vessels. Other interventions that are helpful are estrogen replacement treatment in postmenopausal women, and low-dose aspirin therapy-which is recommended for all patients who can tolerate it. For controlling symptoms and improving angina-free walking time, nitrates, beta blockers, and calcium channel antagonists are efficacious as first-line monotherapy for chronic stable angina in this group of patients. Nitrates may be of special use in patients with impaired left ventricular function, overt congestive heart failure, intermittent coronary vasoconstriction, or coronary artery spasm. In patients with concomitant hypertension or supraventricular tachycardia, beta blockers are helpful. Calcium channel antagonists may be useful in patients with chronic obstructive pulmonary disease, peripheral vascular disease, or hypertension. When optimal monotherapy with a given class of drug fails to control symptoms, alternative monotherapy with a different class of agent should be tried before combination therapy. Combination therapy with 2 or 3 agents is not always superior to optimal monotherapy. Patients who fail to respond to adequate medical therapy should be considered for a revascularization procedure.