EKG hipokalemia dan hiperkalemia
The earliest ECG abnormality seen in hyperkalemia is tall, peaked, symmetrical T waves with a narrow base—the so-called tented T wave. In hyperkalemia, sinoatrial block, second-degree AV block (either Mobitz I or II), and passive or accelerated junctional or ventricular escape rhythm may occur. Severe hyperkalemia may result in either ventricular fibrillation or arrest. The following ECG sequence is associated with a progressive increase in the serum potassium level :
1. Tall, tented T waves
2. Prolongation of the QRS duration (intraventricular block)
3. Prolongation of the PR interval (first-degree AV block)
4. Disappearance of the P wave
5. Wide, bizarre diphasic QRS complex (“sine wave”)
6. Eventual asystole.
These ECG changes are usually seen best in leads II and II and the left precordial leads.