What does an abnormal ST segment indicate?

What does an abnormal ST segment indicate?

The ST Segment represents the interval between ventricular depolarization and repolarization. The most important cause of ST segment abnormality (elevation or depression) is myocardial ischaemia or infarction.

What event does the ST segment of the ECG represent?

The ST segment, which is also known as the ST interval, is the time between the end of the QRS complex and the start of the T wave. It reflects the period of zero potential between ventricular depolarization and repolarization.

What is an ST T abnormality on an ECG?

Abstract. An ST-T abnormality on an electrocardiogram (ECG) is known to independently predict subsequent morbidity and mortality from cardiovascular diseases. But how ST-T abnormality develops in relation to chronologic changes in cardiovascular risk factors has not been fully discussed.

What does abnormal ECG mean?

An abnormal ECG can mean many things. Sometimes an ECG abnormality is a normal variation of a heart’s rhythm, which does not affect your health. Other times, an abnormal ECG can signal a medical emergency, such as a myocardial infarction /heart attack or a dangerous arrhythmia.

What does nonspecific ST abnormality mean?

Non specific ST T wave changes refer to changes in the T waves (such as inversion or flattening) and ST segments (such as ST depression) on the electrocardiogram that due not follow an anatomic distribution and are not diagnostic of any one condition.

What does ST and T wave abnormality mean?

Background: Nonspecific ST and T wave abnormalities (NSSTTA) on resting ECGs are associated with increased cardiovascular risk, and portend similar hazard ratios to traditional risk factors, such as dyslipidemia, hypertension, and diabetes mellitus (DM).

Why is ECG abnormal?

WHAT IS ST elevated myocardial infarction?

ST-segment elevation myocardial infarction (STEMI) is the most acute manifestation of coronary artery disease and is associated with great morbidity and mortality. A complete thrombotic occlusion developing from an atherosclerotic plaque in an epicardial coronary vessel is the cause of STEMI in the majority of cases.Kh

What does an abnormal QRS complex mean?

• Shape of an abnormal QRS complex varies from almost normal to wide and bizarre and/or slurred and notched. • Tall QRS complexes are usually caused by hypertrophy of one or both ventricles, or by an abnormal pacemaker or aberrantly conducted beat.

What does ST-T abnormalities mean?

“Primary” ST-T Wave Abnormalities (ST-T wave changes that are independent of changes in ventricular activation and that may be the result of global or segmental pathologic processes that affect ventricular repolarization): Drug effects (e.g., digoxin, quinidine, etc) Electrolyte abnormalities (e.g., hypokalemia)

What is a normal ST segment?

Normal ST Segment. The ST segment, in normal conditions, is flat or isoelectric, although small variations up to 0.5 mm may be present. To determine ST shift, the segment between previous T wave and the actual P wave (previous TP segment) is used as reference.

What does an elevated ST segment on an EKG mean?

St Elevation (Definition) St elevations refers to a finding on an electrocardiogram, wherein the trace in the st segment is abnormally high above the isoelectric line. Ekg st segment elevation is usually attributed to impending infarction, but can also be due to pericarditis or vasospastic (variant) angina and early repolarization.

What is a nonspecific ST depression?

Chronic ST depression is a non-specific marker for cardiac disease, but is associated with a poor outcome. It can be due to electrolyte abnormalities and drugs, particularly digoxin.

What is the ST segment on electrocardiography (ECG)?

The ST segment is the flat, isoelectric section of the ECG between the end of the S wave (the J point) and the beginning of the T wave. The ST Segment represents the interval between ventricular depolarization and repolarization.