What is p value in ECG?

The P wave on the ECG represents atrial depolarization, which results in atrial contraction, or atrial systole.

What is the normal PP interval in ECG?

ECG Examples The P-P interval varies widely from 1.04 seconds (heart rate ~57 bpm) down to 0.60 seconds (heart rate ~100 bpm); a variability of over 400ms.

What do the bumps mean on an ECG?

Atria. The first “bump” represents the passage of the electrical wave through the atria. Ventricles. The “spike” represents the passage of cardiac electricity in the “highway” of the Purkinge network in the ventricles. The ventricules are two of the four cavities of the heart.

What is P wave and QRS?

The QRS wave is produced by the atrioventricular node (AV). The P wave in an ECG complex indicates atrial depolarization. The QRS is responsible for ventricular depolarization and the T wave is ventricular repolarization.

What does abnormal P wave mean?

P-wave abnormalities are associated with left atrial enlargement, left atrial hypertension, and altered conduction [21–23]. To determine these findings in ECG, P-wave morphology, duration, P-wave dispersion (PD), and PR dispersion are used. The difference between the maximal and minimal P-wave durations defines as PD.

Whats a normal QTc?

• Normal QTc interval is 350–450 ms in males and 360–460 ms in females. • QTd is the difference between the longest and shortest QT interval on standard ECG.

How do you calculate heart rate from PP interval?

  1. to go by RR or PP interval. If it is 1 big box (0.2 secs) then the rate is 60/0.2 = 300 bpm.
  2. Count the number of RR intervals between two Tick marks (6 seconds) in the rhythm strip and multiply by 10 to get the bpm. This method is more effective when the rhythm is irregular.

Does AFib have P waves?

Diagnosis – Atrial Fibrillation. The diagnosis of atrial fibrillation is confirmed with a standard 12-lead ECG. P waves are absent, coarse “fibrillatory waves” can frequently be seen and sometimes no atrial activity can be identified. The QRS complexes are “irregularly irregular”, with varying R-R intervals.

What is P wave and T wave?

‘P’ wave is the first wave in an ECG and is a positive wave. It indicates the activation of the SA nodes. ‘T’ wave too is a positive wave and is the final wave in an ECG though sometimes an additional U wave may be seen. It represents ventricular relaxation. The p wave is also called the atrial complex.