Complications of tachycardias vary depending on the type of tachycardia and whether or not you have heart disease. When tachycardia is an adaptation to a health problem, its positive course or not depends on the treatment of this disease.

When tachycardia is due to heart disease, the course depends on this heart disease.

The most serious complication is the risk of death in case of sudden and severe ventricular tachycardia. Discomfort or loss of consciousness is a sign of seriousness.

When the heart does not contract normally, blood flow is not smooth and a clot can form, sometimes leading to serious complications: stroke or myocardial infarction. Tachycardia can be associated with heart failure.