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Common findings. Sinus rhythm (which is the normal rhythm) has the following characteristics: (1) heart rate 50–100 beats per minute; (2) P-wave precedes every QRS complex; (3) the P-wave is positive in lead II and (4) the PR interval is constant.
- Ecg Interpretation
At the heart of ECG interpretation lies the ability to...
- Ecg Interpretation
This site provides a comprehensive overview of normal values for the adult and the pediatric electrocardiogram (ECG), covering the whole range of ages from the very young to the very old. Normal values are based on computerized analysis of more than 15,000 ECGs.
At the heart of ECG interpretation lies the ability to determine whether the ECG waves and intervals are normal. This chapter will focus on the ECG waves in terms of morphology (appearance), durations and intervals.
Normal ECG. A normal ECG is illustrated above. Note that the heart is beating in a regular sinus rhythm between 60 - 100 beats per minute (specifically 82 bpm). All the important intervals on this recording are within normal ranges. 1. P wave: upright in leads I, aVF and V3 - V6. normal duration of less than or equal to 0.11 seconds.
Normal ECG Values Chart. Additional notes. References. ECG & ECHO Learning. (2017, May 30). ECG interpretation: Characteristics of the normal ECG (P-wave, QRS complex, ST segment, T-wave). https://ecgwaves.com/topic/ecg-normal-p-wave-qrs-complex-st-segment-t-wave-j-point/ Rosenthal, L. (2024, February 16).
Sinus rhythm (which is the normal rhythm) has the following characteristics: (1) heart rate 50–100 beats per minute; (2) P-wave precedes every QRS complex; (3) the P-wave is positive in lead II and (4) the PR interval is constant.
What do the segments of the ECG represent? P-wave: Atrial contraction. PR interval: Represents the time taken for excitation to spread from the sino-atrial (SA) node across the atrium and down to the ventricular muscle via the bundle of His. QRS: Ventricular contraction. ST segment: Ventricular relaxation.
