Is sinus tachycardia dangerous? There are so many complications

There are many causes of sinus tachycardia, the most common ones are physiological, pathological, and drug-related. If it is physiological, it will not cause too much harm to the human body and the danger is extremely small; but if it is pathological, special attention must be paid and active treatment must be received, otherwise it will cause complications such as pulmonary edema, heart failure, cardiogenic shock, etc., which is extremely dangerous.

1. Pulmonary edema

Pulmonary edema is an increase in lung water content caused by a disorder in the fluid exchange function between blood vessels and tissues in the lungs. This disease can seriously affect respiratory function and is a common cause of acute respiratory failure in clinical practice. The main clinical manifestations are extreme dyspnea, orthopnea, cyanosis, profuse sweating, paroxysmal coughing accompanied by large amounts of white or pink frothy sputum, symmetrical moist rales in both lungs, and butterfly-shaped, flake-like fuzzy shadows in both lungs on chest X-rays. Shock and even death may occur in the late stages. Arterial blood gas analysis may show low O2, low CO2 partial pressure, severe O2 deficiency, CO2 retention and mixed acidosis in the early stages.

2. Heart failure

Heart failure is divided into left heart failure and right heart failure. The main symptoms of left heart failure are fatigue, dyspnea, which initially occurs during exertion and eventually develops into dyspnea at rest, and the patient can only breathe while sitting up. Paroxysmal dyspnea is a typical manifestation of left heart failure, which often occurs during deep sleep and is characterized by chest tightness, shortness of breath, cough, and wheezing. In particularly severe cases, it can develop into acute pulmonary edema with symptoms of severe wheezing, orthopnea, extreme anxiety, and coughing up foamy mucus (typically pink foamy sputum), cyanosis, and other symptoms of lung congestion. The main manifestations of right heart failure are lower limb edema, distended neck veins, loss of appetite, nausea and vomiting, oliguria, nocturia, and separation of drinking and urination.

3. Cardiogenic shock

Cardiogenic shock refers to a syndrome in which the cardiac function is extremely impaired, resulting in a significant decrease in cardiac output and causing severe acute peripheral circulatory failure. The main clinical manifestations are severe underlying heart disease symptoms. Symptoms of systemic circulatory failure include persistent hypotension, oliguria, impaired consciousness, peripheral cyanosis, etc. It may also be accompanied by acute pulmonary edema and changes in hemodynamic indicators, that is, arterial pressure <10.7KPa (80mmHg), central venous pressure may be normal or high, but cardiac output is extremely low.