Differential Diagnosis for Peaked T Waves
- Single most likely diagnosis
- Hyperkalemia: This is the most common cause of peaked T waves, as elevated potassium levels can alter the repolarization phase of the cardiac action potential, leading to the characteristic peaked appearance of T waves on an electrocardiogram (ECG).
- Other Likely diagnoses
- Acute myocardial infarction: In the early stages of a heart attack, peaked T waves can be observed, often accompanied by other ECG changes such as ST-segment elevation.
- Cardiac hypertrophy: Conditions like left ventricular hypertrophy can lead to changes in the T wave morphology, including peaking, due to the increased thickness of the heart muscle.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Cardiac arrhythmias (e.g., ventricular tachycardia): Although not the primary cause, certain arrhythmias can present with peaked T waves and require immediate attention due to their potential to deteriorate into life-threatening conditions.
- Myocarditis: Inflammation of the heart muscle can lead to various ECG abnormalities, including peaked T waves, and its diagnosis is critical due to its potential for severe complications.
- Rare diagnoses
- Hypothermia: Severe hypothermia can cause a range of ECG abnormalities, including peaked T waves, due to the slowing of bodily functions and effects on the heart.
- Central nervous system disorders: Certain conditions affecting the brain, such as subarachnoid hemorrhage, can have a profound impact on the heart, leading to ECG changes including peaked T waves, through mechanisms like catecholamine surge.