Hyperkalemia, hyperacute T wave or neither of them



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Sinus tachycardia vs Sinus bradycardia vs Sinus arrhythmia

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A) Sinus tachycardia is sinus rhythm with heart rate over 100/min. This rhythm is regular with normal appearance P wave and normal duration PR intervals. QRS complexes can be narrow or wide. B) Sinus bradycardia is sinus rhythm with heart rate bellow 60/min. This rhythm is regular with normal appearance P wave and normal duration PR intervals. QRS complexes can be narrow or wide. C) Sinus arrhythmia is sinus rhythm with variation of P-P (R-R) intervals at least 120ms. P wave has normal appearance and normal PR intervals. QRS complexes can be narrow or wide.
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Pulseless patient

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This ECG registered in patient without pulse shows pulseless electrical activity. Pulseless electrical activity (Electromechanical dissociation) is one of three types of cardiac arrest together with ventricular fibrillation and asystoly. Normally electrical activity produces mechanical activity. In electromechanical dissociation we have electrical activity in ECG but no pulse is present. This pathology should be treated with cardiopulmonary resuscitation. In ECG, electromechanical dissociation may have different appearance (with narrow or wide QRS complexes).
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RBBB vs LBBB vs IVCD

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This ECG shows: a) RBBB b) LBBB c) IVCD This ECG present typical changes for RBBB. The RBBB criteria fulfilled in this case are: -           Supraventricular rhythm. -           Wide QRS complex (>120 ms) with rsR’ morphology. -           Slurred S wave in V6. -           T wave discordance in precordial leads.   The most common cause of RBBB are: ASD, COPD, right ventricular hypertrophy, pulmonary thromboemboli, ischaemic heart disease, hypertension, cardiomyopathy.
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