Which of the following statements about digoxin is incorrect?

Digoxin is a cardiac glycoside primarily used to treat certain types of heart conditions, particularly heart failure and atrial fibrillation. One of its notable pharmacological effects is indeed to increase the force of myocardial contraction, which leads to improved cardiac output. Additionally, digoxin has the ability to decrease the heart rate, making it beneficial in patients with a rapid heartbeat due to atrial fibrillation.

Moreover, digoxin allows the heart to work more efficiently, which is particularly important in patients with heart failure. By increasing the strength of heart contractions and allowing for a more effective beat, it helps to relieve symptoms of heart failure.

However, the incorrect statement pertains to its use in the treatment of angina. Digoxin is not indicated for treating angina; rather, angina is typically managed using other classes of medications, such as nitrates, beta-blockers, or calcium channel blockers, which help to relieve the angina by reducing myocardial oxygen demand or improving blood flow to the heart, rather than by increasing myocardial contractility, which is what digoxin does. This distinction makes the statement regarding digoxin's use in angina incorrect.