Cardiology

Dizziness

'Dizziness' actually covers several distinct sensations with very different causes — describing exactly what you feel is often the key to figuring out why.

Fast Heart Rate: Causes, Symptoms, and When to Seek Medical Care

A racing heart is often a normal reaction to exercise, stress, or caffeine — but persistent or unexplained tachycardia can point to an underlying condition worth checking.

Shortness of Breath: Causes

Shortness of breath ranges from an expected response to exertion to a sign of a serious heart or lung condition — here's how the causes differ and when it's an emergency.