S wave in Electrocardiography (ECG) ; Normal S wave, Abnormal S wave, Pathologic S wave
Автор: MBBS NAIJA
Загружено: 2024-09-07
Просмотров: 409
Описание:
The S wave in electrocardiography (ECG) represents the depolarization of the ventricles, specifically the terminal portion of the QRS complex.
Characteristics:
1. Direction: Downward deflection in leads I, II, and V1-V3
2. Amplitude: Typically smaller than the R wave
3. Duration: Approximately 0.04-0.12 seconds
Significance:
1. Ventricular depolarization: The S wave indicates the completion of ventricular depolarization
2. QRS complex: The S wave is the final component of the QRS complex
3. Axis determination: The S wave helps determine the electrical axis of the heart
Abnormalities:
1. Deep S wave: May indicate left ventricular hypertrophy or coronary artery disease
2. Wide S wave: May indicate ventricular conduction delay or bundle branch block
3. Absent S wave: May indicate Wolff-Parkinson-White syndrome or other pre-excitation syndromes
Leads with prominent S waves:
1. Lead II
2. Lead III
3. Lead aVF
4. Lead V1
5. Lead V2
Remember, the S wave is an essential component of the ECG, providing valuable information about ventricular depolarization and cardiac function.
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