While mild hyperkalemia probably has a limited effect on the heart, moderate hyperkalemia can produce EKG changes (EKG is a reading of the electrical activity of the heart muscles), and severe hyperkalemia can cause suppression of electrical activity of the heart and can cause the heart to stop beating.What are the ECG characteristics of hypercalcemia?
ECG characteristics of hyperkalemia, high blood potassium: P-waves are widened and of low amplitude due to slowing of conduction QRS complex: QRS widening fusion of QRS-T loss of the ST segment Tall tented T wavesWhy do you get peaked T waves in hyperkalemia?
Hyperkalemia — Suspect as the cause of T wave peaking when the clinical setting is one likely to produce hyperkalemia (ie, renal failure, volume depletion, acidosis, potassium-retaining drugs) – and – when T waves are tall, pointed with steep ascent and near equally steep descent with a narrow base (as seen in Figure 2 ).Why does hyperkalemia cause peaked T waves?
ECG changes have a sequential progression of effects, which roughly correlate with the potassium level. ECG findings may be observed as follows: Early changes of hyperkalemia include peaked T waves, shortened QT interval, and ST-segment depression.