Pr interval

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  • (BQ) Part 1 book "Making sense of the ECG" presents the following contents: PQRST - Where the waves come from, heart rate, rhythm, the P wave, the PR interval, the axis, the Q wave.

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  • PR interval: time interval from onset of atrial depolarization to onset of ventricular depolarization • QT interval: duration of ventricular depolarization and repolarization • RR interval: duration of ventricular cardiac cycle • PP interval: duration of atrial cycle. As a positive wave of depolarization within the heart moves toward a positive electrode there is a upward deflection recored on EKG

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  • Heart rate is calculated as the number of times the heart beats per minute. It usually measures ventricular rate (the number of QRS complexes) but can refer to atrial rate (the number of P waves). The method chosen to calculate HR varies according to rate and regularity on the ECG tracing.

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  • Left Atrial Abnormality & 1st degree AV Block-KH Frank G.Yanowitz, M.D. The P-wave is notched, wider than 0.12s, and has a prominent negative (posterior) component in V1 - all criter for left atrial abnormality or enlargement (LAE). The PR interval 0.20s. Minor ST-T wave abnormalities are also present.

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  • Tham khảo sách 'ecg notes: interpretation and management guide_1', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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