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Bradycardia
- slowing of heart rate <60 bpm
Sinus bradycardia
- Rate <60bpm with normal QRS complexes
- Common in athletes, patients taking beta-blockers, the elderly and during
MI
- Only requires treatment if causes or threatens haemodynamic compromise
Treatment
Complete (third degree) heart block
- P wave not transmitted to ventricles, more P waves than QRS complexes.
- Complete atrio-ventricular dissociation which can cardiac failure and/or
Stokes-Adams attacks.
Treatment
- is by electrical pacing;
- if a delay in arranging this is unavoidable and external pacing
can't be done then beta-
agonists such as isoprenaline are sometimes used.
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