Stress tests measure the amount of stress your heart can manage before it beats in an irregular rhythm or affects your blood flow. The exercise stress test is the one doctors use most often, including ...

Dear Mayo Clinic: I have a treadmill stress test scheduled to look for heart disease. I know this involves exercising, and I'm worried that I'm not physically up to it. Is there another way to gather ...

In a stress test — also known as an exercise or treadmill test — a doctor monitors a person’s heart rate as they exercise or undergo a chemical stressor. It can show how well a person’s heart works ...

A chemical stress test uses medications to simulate your heart’s response to exercise. A stress test can assess how well your heart performs during exercise. Your doctor may suggest a stress test if ...

If you use an inhaler for your breathing, bring it to the test. You may also be asked to stop taking other heart drugs on the day of your test. If you have questions about your meds, ask your doctor.

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia occurs ...

An electrocardiogram (ECG) is a quick test that demonstrates how your heart's electrical activity operates. It is run in both routine health check-ups and emergency situations to detect a range of ...

The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node, or SA node.

Dear Mayo Clinic: I have a treadmill stress test scheduled to look for heart disease. I know this involves exercising, and I’m worried that I’m not physically up to it. Is there another way to gather ...