What causes low systolic pressure with normal diastolic pressure and a small pulse pressure?

Low pulse pressure with normal diastolic pressure generally refers to high systolic pressure, normal diastolic pressure, and a small pulse pressure. This may be caused by conditions such as pericardial effusion, constrictive pericarditis, or aortic valve insufficiency. Specific causes are as follows:

1. Pericardial Effusion

This can be caused by infections, immune-inflammatory reactions, etc. When pericardial fluid increases suddenly and rapidly, the pericardium's adaptive expansion is limited, which may lead to reduced pulse pressure. Treatment may include medications such as furosemide tablets or spironolactone tablets under a doctor's guidance.

2. Constrictive Pericarditis

This usually refers to recurrent chronic inflammation caused by bacterial infection of the pericardium, leading to pericardial calcification, thickening, and cardiac compression, which may result in the aforementioned phenomenon. Medications such as micronized purified flavonoid fraction tablets (e.g., Daflon) or isoniazid tablets may be used according to medical advice.

3. Aortic Valve Insufficiency

The aortic valve is located between the left ventricle and the aorta. Incomplete closure of the aortic valve allows blood pumped into the aorta to flow back into the left ventricle, causing the above-mentioned condition. Treatment may involve medications such as metoprolol succinate extended-release tablets or furosemide tablets under medical supervision.

In addition to the above causes, this condition may also result from hypertension, hyperlipidemia, peripheral circulatory failure, and other factors. It is important to get adequate rest and avoid excessive fatigue.