Combined propranolol and digoxin therapy in angina pectoris

Area of Science:

• Cardiology
• Pharmacology

Background:

• Coronary heart disease (CHD) frequently leads to angina pectoris.
• Assessing the efficacy of beta-blockers and cardiac glycosides in managing CHD symptoms is crucial.

Purpose of the Study:

• To evaluate the combined and individual effects of oral propranolol and digoxin on angina frequency, heart size, and exercise tolerance in patients with CHD.

Main Methods:

• Twenty patients with coronary heart disease were treated with oral propranolol alone, digoxin alone, or a combination of both.
• Key metrics including angina attack frequency, heart dimensions, systolic time intervals, and treadmill exercise duration were monitored.

Main Results:

• Propranolol alone significantly decreased weekly angina attacks (16 to 7; P<0.02).
• Combined propranolol and digoxin therapy significantly increased mean exercise duration (390±42s to 458±46s; P<0.01), particularly benefiting patients with impaired left ventricular function.
• Propranolol alone caused a significant increase in left heart size (P<0.001), which was reversed by digoxin co-administration.

Conclusions:

• Oral propranolol and digoxin combination therapy is advantageous for patients experiencing angina pectoris, especially those with abnormal ventricular function or enlarged hearts.
• This combination offers improved exercise capacity and symptom relief in specific CHD patient subgroups.