Assessment Test - Assessment Test Inside you will get:  Exam F...

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Relias Dysrhythmia Basic A Assessment Test

Inside you will get:

 Exam Focus: EKG strips

 The Exam has passing score of 90%  55 Questions and Answers  Expert-Verified explanation  Key points

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1. Normal sinus rhythm:

Regular Rate: 60-100

P Wave: Present, upright

PR Interval: 0.12-0.20 sec

QRS: <0.12 sec

**Description**: Normal sinus rhythm indicates that the heart's electrical impulses are originating from the sinoatrial (SA) node, which is the natural pacemaker of the heart. This rhythm is characterized by a consistent heart rate, recognizable P waves before each QRS complex, a normal PR interval, and a narrow QRS complex, indicating healthy conduction through the ventricles. Normal sinus rhythm is the ideal rhythm for the heart and reflects normal physiological function.

Key points about normal sinus rhythm:

 Regular rhythm: The intervals between heartbeats (RR intervals) are consistent.

 Rate: Falls within the range of 60-100 beats per minute.

 P wave: Present and upright in most leads, indicating normal atrial depolarization. 2 / 4

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 PR interval: The time between the onset of the P wave and the start of the QRS complex, typically measuring between 0.12-0.20 seconds. QRS complex: Represents ventricular depolarization, with a duration less than 0.12 seconds.

2. Sinus Bradycardia:

Regular Rate: <60

P Wave: Present, upright

PR Interval: 0.12-0.20 sec

QRS: <0.12 sec

**Description**: Sinus bradycardia is a type of rhythm where the heart beats slower than normal, with a heart rate of less than 60 bpm. It originates from the sinoatrial (SA) node, as indicated by the presence of upright P waves before each QRS complex. The PR interval remains within the normal range, suggesting normal atrioventricular (AV) conduction. The QRS complexes are narrow, indicating that ventricular depolarization is occurring normally. Sinus bradycardia can be a normal physiological response in athletes or during sleep, but it can also indicate underlying issues such as enhanced vagal tone or medications affecting heart rate. In some cases, it may require further evaluation or treatment, especially if it leads to symptoms. 3 / 4

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Key points about this ECG interpretation:

 Sinus rhythm: The electrical impulse originates from the sinus node, which is the normal pacemaker of the heart.

 Bradycardia: The heart rate is below 60 beats per minute.

 Normal P waves: A P wave is seen before each QRS complex, indicating normal atrial depolarization. Normal PR interval: The time between the onset of the P wave and the beginning of the QRS complex falls within the normal range (0.12-0.20 seconds). Normal QRS duration: The QRS complex is narrow, indicating rapid ventricular depolarization.

Possible causes of sinus bradycardia:

 Increased vagal tone (e.g., during deep breathing or in athletes)  Certain medications (beta-blockers, calcium channel blockers)  Hypothyroidism  Low body temperature  Elevated intracranial pressure

3. Sinus Tachycardia:

Regular Rate: 100-150

P Wave: Present, upright

PR Interval: 0.12-0.20 sec

QRS: <0.12 sec

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