Cardiac ekg rhythms (Verified)
Normal Sinus Rhythm
● Rate: 60-100 beats per minute
● Rhythm: Atrial and Ventricular Regular
● P Wave: Uniform in appearance, upright, normal shape, one preceding each QRS complex
● PR Interval: 0.12- 0.2 seconds
● QRS: 0.12 second or less. (If large...
Cardiac ekg rhythms (Verified)
Normal Sinus Rhythm
● Rate: 60-100 beats per minute
● Rhythm: Atrial and Ventricular Regular
● P Wave: Uniform in appearance, upright, normal shape, one preceding each
QRS complex
● PR Interval: 0.12- 0.2 seconds
● QRS: 0.12 second or less. (If larger than 0.12- QRS is wide and there may be a
bundle branch block)
Sinus Bradycardia
● Rate: Less than 60 beats per minute
● Rhythm: Atrial and Ventricular Regular
● P Waves: Uniform in appearance, upright, normal shape, one preceding
each QRS complex
● PR Interval: 0.12-0.2 seconds
● QRS: Usually 0.12 seconds or less
● Etiology: athletic training, MI, hypothyroidism, hypothermia, sick sinus
syndrome, medications, increased ICP
● Treatment: *None may be indicated*
○ Treat underlying cause
○ Atropine #1 medication to treat bradycardia!!!!!
○ Pacemaker for patients with chronic bradycardia, takes over SA
node; puts intrinsic rate into heart
Sinus Tachycardia
, ● Rate: Usually 100-140 beats per minute
● Rhythm: Atrial and ventricular regular
● P Waves: Uniform in appearance, upright, normal shape, one preceding
each QRS
● PR Interval: 0.12-0.2 second
● QRS: Usually 0.12 second or less
● Etiology: stress or fear, anemia, fever, hypoxia, shock, hyperthyroidism,
drugs, heart failure, pain, hypoglycemia
● Treatment:
○ Treat underlying cause
○ β Blocker
○ Calcium Channel Blocker (Diltiazem aka Cardizem)
○ Valsalva Maneuvers – series of motions that stimulates nerve, running
by the heart, which slows it down; ex: bearing down
Sinus Arrhythmia
● Rate: Usually 60-100 beats per minute
● Rhythm: Atrial and ventricular occasionally have an irregular beat
● P Waves: Uniform in appearance, upright, normal shape, one preceding
each QRS
● PR Interval: 0.12-0.2 second
● QRS: Usually 0.12 second or less
● Etiology: idiopathic (unknown cause), stress, electrolyte imbalance – first sign
● Treatment: likely no treatment unless symptomatic -- treat
underlying condition!
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