Pathological changes in ECG (scorebuilders)
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each of the black spaces below before clicking
on it to display the answer.
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| Depressed QRS | show 🗑
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| show | abnormal pacemaker sites w/in the heart (outside of the SA node) that display automaticity. Their pacemaker activity, however, is normally suppressed (overdrive suppression) by the higher rate of the SA node. They can occur within the atria or ventricles
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| Elevated QRS | show 🗑
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| show | previous myocardial infarction
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| show | acute MI
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| show | - Irregular atrial rhythm
- No rate
- No P waves
- ‘F’ waves absent
- Quivers noted
- Ventricular rhythm varies
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| A-Fib causes | show 🗑
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| Supraventricular Tachycardia | show 🗑
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| show | Mitral valve prolapse, cor pulmonale, digitalis toxicity and rheumatic heart disease
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| Premature atrial contractions (PAC) | show 🗑
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| show | Intake of caffeine, emotional stress, smoking, and pathologies such as CAD, electrolyte imbalance, infection and CHF
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| show | - Rate usually > 100 bpm
- Rhythm usually regular
- No P wave or appears after QRS complex w/ retrograde conduction
- Requires immediate medical attention
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| Common causes of Ventricular Tachycardia | show 🗑
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| Ventricular Fibrillation (V. FIb) | show 🗑
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| show | Long term or severe Heart disease, post MI, hypercalcemia, hypokalemia and hyperkalemia
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| show | - Rate >150 bpm
- Irregular rhythm
- No P waves
- QRS complex is wide
- Requires immediate medical intervention
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| Common causes of multifocal ventricular tachycardia | show 🗑
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| show | Ectopic focus in the vetricles or Purkinje fibers fires and supercedes normal conduction
- Rate b/w 60-100 bpm
- P wave is absent
- ST segment is distorted
- QRS complex occurs early
- Irregular rhythm that can be regularly irregular
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| Common Causes of Premature Ventricular COntractions | show 🗑
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| show | - Regular rhythm
- Atrial rate > ventricular rate
- Requires immediate medical intervention (pacemaker)
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| Common causes of Complete Heart Block (third degree AV block) | show 🗑
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| show | - No rhythm
- Absence of P wave, QRS and T waves
- Can have abrupt onset
- Requires immediate medical attention
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| Common causes of Asystole | show 🗑
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Created by:
Sarann4
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