What does ST depression on stress test mean?

ST-segment depression is a lowered J-point and a slope that occurs 60-80 ms after the J-point. This is the most common indicator of CAD. The standard criterion for a positive test is more than 1 mm horizontal or downsloping ST-segment depression with the PR segment as the isoelectric baseline of the ECG [61-65].

What does ST depression on an ECG mean?

ST depression in ECG at entry indicates severe coronary lesions and large benefits of an early invasive treatment strategy in unstable coronary artery disease; the FRISC II ECG substudy. The Fast Revascularisation during InStability in Coronary artery disease. Eur Heart J.

What does ST depression in all leads mean?

Diffuse ST-segment depression with ST-segment elevation in the lead augmented vector right (aVR) in 12-lead electrocardiography may indicate the possibility of coronary artery disease involving the left main coronary artery or proximal left anterior descending artery, pulmonary embolism or takotsubo cardiomyopathy.

What does an ST segment mean on a stress test?

They concluded that ST segment elevation is a good indicator of severe ischemia and poor collateral circulation. Several other case reports also found rare cases of ST elevations in non-Q wave leads during exercise stress testing that accurately predicted the presence of coronary stenoses (9–11).

How serious is ST depression?

Asymptomatic ST-depression was associated with a 3.2-fold risk of sudden cardiac death.

How much ST depression is significant?

Measurement. ST segment depression may be determined by measuring the vertical distance between the patient’s trace and the isoelectric line at a location 2-3 millimeters from the QRS complex. It is significant if it is more than 1 mm in V5-V6, or 1.5 mm in AVF or III.

Can ST depression on ECG be normal?

ST segment depression less than 0.5 mm is accepted in all leads. ST segment depression 0.5 mm or more is considered pathological. Some expert consensus documents also note that any ST segment depression in V2–V3 should be considered abnormal (because healthy individuals rarely display depressions in those leads).

How many mm of ST depression is significant?

Does stress cause ST depression?

ST segment depression (STD) is an established electrocardiographic sign of myocardial ischemia during stress testing 1, 2, 3. However, STD may represent reciprocal changes corresponding to elevation of ST signal reflecting the opposite electrocardiographic leads rather than myocardial ischemia (4).

What is the most common cause of ST segment depression?

The most important cause of ST segment abnormality (elevation or depression) is myocardial ischaemia or infarction.

When are ST depressions significant?

Does ST depression indicate ischemia?

Electrocardiographic ST segment depression in this population may indicate one of four diagnoses: myocardial ischaemia (without infarction), acute posterior wall AMI, reciprocal ST segment change in the setting of AMI, and non-ST segment elevation AMI (formerly the non-Q wave AMI).