ST depression

ST depression refers to a finding on an ECG where the trace in the ST segment is abnormally low below the baseline. It is significant as it may indicate ischemia, or lack of oxygen, to the heart muscle.

Depression Geyser (9 August 2015)

Causes

ST depression can be caused by several factors, including:

• Ischemia: This is the most common cause of ST depression. It occurs when there is a lack of oxygen supply to the heart muscle, often due to a blocked coronary artery.
• Digitalis: This medication, used to treat heart conditions, can cause ST depression.
• Hypokalemia: Low levels of potassium in the blood can cause ST depression.
• Ventricular hypertrophy: This condition, where the ventricles of the heart are enlarged, can cause ST depression.

Diagnosis

ST depression is diagnosed using an ECG. The ECG will show a trace with the ST segment depressed below the baseline. The degree of depression can indicate the severity of the ischemia.

Treatment

Treatment for ST depression involves treating the underlying cause. This may involve:

• Angioplasty: This procedure is used to open up blocked coronary arteries.
• Medication: Various medications can be used to treat the conditions that cause ST depression.
• Lifestyle changes: Changes to diet and exercise can help prevent further episodes of ST depression.

See also

• ST elevation
• Myocardial infarction
• Angina pectoris