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31 Οκτ 2023 · Sinus rhythm refers to the rhythm of your heartbeat, determined by the sinus node of your heart. The sinus node creates an electrical pulse that travels through your heart muscle, causing...
A sinus rhythm is any cardiac rhythm in which depolarisation of the cardiac muscle begins at the sinus node. [1] It is necessary, but not sufficient, for normal electrical activity within the heart. [2] On the electrocardiogram (ECG), a sinus rhythm is characterised by the presence of P waves that are normal in morphology. [2]
Definition (criteria) for sinus rhythm. Regular rhythm with ventricular rate between 50 and 100 beats/min. P-wave with constant morphology preceding every QRS complex. The P-wave is positive in lead II. Figure 1 (below) shows normal sinus rhythm at paper speed 25 mm/s.
8 Οκτ 2024 · ECG features of normal sinus rhythm. Regular rhythm at a rate of 60-100 bpm (or age-appropriate rate in children) Each QRS complex is preceded by a normal P wave. Normal P wave axis: P waves upright in leads I and II, inverted in aVR. The PR interval remains constant.
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.
On an ECG, the normal sinus rhythm is characterized by a P wave corresponding to atrial depolarization wave, and it is followed by an isoelectric line where the depolarization wave goes through the atrioventricular (AV) node. After, there is the QRS complex that represents ventricular depolarization.
5 Μαΐ 2022 · Normal Sinus Rhythm (NSR) is the expected rhythm on an EKG in patients without pathophysiology. It represents the normal electrical cycle of the heart, which was discovered once a tool capable of detecting it was invented: the electrocardiogram (EKG/ECG).
