What does S1 S2 S3 pattern mean on ECG?

S1 S2 S3 pattern = far right axis deviation with dominant S waves in leads I, II and III. Deep S waves in the lateral leads (I, aVL, V5-V6).

What is an S1 S2 S3?

Abstract. The S1 S2 S3 pattern in the electrocardiogram has been variously defined. Some apply this term to all cases with an S wave in each standard lead, regardless of magnitude, while others use it to indicate situations where the prominent QRS deflection is an S wave in these leads.

What do deep S waves mean?

T HE presence of a deep S wave in leads. V1 or V2 is often interpreted as evidence. suggesting left ventricular hypertrophy.

What does Vector mean in ECG?

This discrepance between the basic ECG interpretation and clinical medicine is well described by a short statement by W. “Because the movement of charge (i.e., the spreading wave of electrical activity in the heart) has both a three-dimensional direction and a magnitude, the signal measured on an ECG is a vector.

What does S1 S2 and S3 sound like?

Heart Sounds

What is a normal S wave?

In the normal ECG, there is a large S wave in V1 that progressively becomes smaller, to the point that almost no S wave is present in V6. A large slurred S wave is seen in leads I and V6 in the setting of a right bundle branch block. The presence or absence of the S wave does not bear major clinical significance.

What do tall R waves mean?

Tall R waves in V1 can be caused by abnormal electrical conduction (RBBB or left-sided VT, which slowly spreads across the right ventricle, or a left-sided accessory pathway), loss of posterior myocardium (old or acute posterior MI) or chronic anterior hypertrophy (HCM), chronic or acute RV strain (RVH, PE), congenital …

What does AP Wave represent?

The P wave represents the electrical depolarization of the atria. In a healthy person, this originates at the sinoatrial node (SA node) and disperses into both left and right atria.

What does S1 S2 S3 mean in an electrocardiogram?

abstract = “The S1 S2 S3 pattern in the electrocardiogram has been variously defined. Some apply this term to all cases with an S wave in each standard lead, regardless of magnitude, while others use it to indicate situations where the prominent QRS deflection is an S wave in these leads.

Is the s1s2s3 electrocardiographic pattern indeterminate?

In addition, in 10 cases without manifestations of cardiac disease this electrocardiographic pattern was demonstrated, although it was usually of an indeterminate axis type, and was associated with an otherwise normal electrocardiogram.

What is the s pattern in an electrocardiogram?

Abstract The S 1 S 2 S 3 pattern in the electrocardiogram has been variously defined. Some apply this term to all cases with an S wave in each standard lead, regardless of magnitude, while others use it to indicate situations where the prominent QRS deflection is an S wave in these leads.

Which is louder S1 or S2 at the base of the heart?

Normally, S1 is louder than S2 at the apex, and softer than S2 at the base of the heart. Pathologic changes in the intensity of S1 relative to S2 may be seen in certain disease states.