Hypoaldosteronism electrocardiogram: Difference between revisions
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==Overview== | ==Overview== | ||
In hypoaldosteronism there are no specific ECG findings. However, hypoaldosteronism predisposes to hyponatremia (decreased renal absorption) and hyperkalemia (decreased renal excretion). Severe hyponatremia may present with ST segment elevation mimicking acute myocardial infarction. On the other hand, hyperkalemia leads to depression of SA node and conduction pathways such as AV node and His-Purkinje system causing bradycardia and conduction defects. | In hypoaldosteronism there are no specific ECG findings. However, hypoaldosteronism predisposes to hyponatremia (decreased renal absorption) and hyperkalemia (decreased renal excretion). Severe hyponatremia may present with ST segment elevation mimicking acute myocardial infarction. On the other hand, hyperkalemia leads to depression of SA node and conduction pathways such as AV node and His-Purkinje system causing bradycardia and conduction defects. | ||
==Electrocardiogram== | ==Electrocardiogram== | ||
Revision as of 19:33, 21 August 2017
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:
Overview
In hypoaldosteronism there are no specific ECG findings. However, hypoaldosteronism predisposes to hyponatremia (decreased renal absorption) and hyperkalemia (decreased renal excretion). Severe hyponatremia may present with ST segment elevation mimicking acute myocardial infarction. On the other hand, hyperkalemia leads to depression of SA node and conduction pathways such as AV node and His-Purkinje system causing bradycardia and conduction defects.
Electrocardiogram
There are no specific ECG findings associated with hypoaldosteronism. However, hypoaldosteronism predisposes to hyponatremia (decreased renal absorption) and hyperkalemia (decreased renal excretion).
- Hyperkalemia leads to depression of SA node and conduction pathways such as AV node and His-Purkinje system. Findings on an ECG suggestive of hyperkalemia include:
- Peaked T waves in chest leads.
- Widening of the QRS complex (seen with potassium level ≥ 6.5 mEq/L).
- Prolonged QRS interval and conduction blocks such as bundle branch blocks or fascicular blocks (seen with potassium level ≥ 7 mEq/L).
- Ventricular fibrillation, PEA and cardiac arrest (seen with potassium level ≥ 9 mEq/L).
- Hyponatremia may slow cardiac pacemaker activity. Findings on an ECG suggestive of hyponatremia include:
- ST segment elevation mimicking acute myocardial infarction.