The triggers of acute heart failure include the following aspects:

Respiratory infections are the most common and important trigger, and infective endocarditis is also not uncommon. However, due to its concealed onset, it is easily underdiagnosed.

The second is arrhythmia, among which atrial fibrillation is one of the most common arrhythmias in organic heart disease and is also an important factor leading to heart failure. Additionally, rapid arrhythmias can also cause acute heart failure.

The third is an increase in blood volume, such as excessive salt intake or excessive or rapid intravenous fluid administration.

The fourth is excessive physical exertion or emotional excitement, such as during late pregnancy or childbirth.

The fifth aspect is improper treatment, inappropriate use of diuretics or antihypertensive drugs, which can also trigger an episode of acute heart failure.

Furthermore, whether it is an exacerbation of existing heart disease or complications with other diseases, such as coronary heart disease with myocardial infarction, rheumatic disease becoming active, or complications with hyperthyroidism or anemia, can all cause acute heart failure.