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 | 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 (physiology)|depression]] of [[SA node]] and [[Conduction System|conduction pathways]] such as [[AV node]] and [[His-Purkinje system]] causing [[bradycardia]] and [[Conduction block|conduction blocks]]. | ||
==Electrocardiogram== | ==Electrocardiogram== | ||
There are no specific ECG findings associated with hypoaldosteronism. However, hypoaldosteronism predisposes to hyponatremia (decreased renal absorption) and hyperkalemia (decreased renal excretion). | 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: | *[[Hyperkalemia]] leads to [[Depression (physiology)|depression]] of [[SA node]] and [[Conduction System|conduction pathways]] such as [[AV node]] and [[His-Purkinje system]]. Findings on an [[ECG]] suggestive of [[hyperkalemia]] include: | ||
**Peaked T waves in chest leads. | **[[Peaked T waves]] in chest leads. | ||
**Widening of the QRS complex (seen with potassium level ≥ 6.5 mEq/L). | **[[Wide QRS complex|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). | **Prolonged [[QRS interval]] and [[Conduction block|conduction blocks]] such as [[Bundle branch block|bundle branch blocks]] or [[Fascicular block|fascicular blocks]] (seen with [[potassium]] level ≥ 7 mEq/L). | ||
**Ventricular fibrillation, PEA and cardiac arrest (seen with potassium level ≥ 9 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: | *[[Hyponatremia]] may slow [[cardiac pacemaker]] activity. Findings on an [[ECG]] suggestive of [[hyponatremia]] include: | ||
**ST segment elevation mimicking acute myocardial infarction. | **[[ST segment elevation]] mimicking [[acute myocardial infarction]]. | ||
==References== | ==References== | ||
Revision as of 19:39, 21 August 2017
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Hypoaldosteronism Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Hypoaldosteronism electrocardiogram On the Web |
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American Roentgen Ray Society Images of Hypoaldosteronism electrocardiogram |
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Risk calculators and risk factors for Hypoaldosteronism electrocardiogram |
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 blocks.
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.