In a split-night study, what is the likely cause of spiked T waves on the ECG channel?

Spiked T waves on the ECG are typically an indication of hyperkalemia, which is an elevated level of potassium in the blood. This condition can alter the normal electrical activity of the heart, resulting in characteristic changes on the ECG, including the appearance of tall, peaked T waves.

In the setting of a split-night study, the detection of spiked T waves may prompt further investigation into the patient's electrolyte levels, particularly potassium. Conditions such as renal failure, certain medications, or excessive potassium intake can lead to hyperkalemia, necessitating timely clinical intervention to mitigate potential cardiac complications.

The presence of spiked T waves is a critical finding which will guide the clinician toward managing the patient's electrolyte balance effectively. Recognizing these changes in the context of a polysomnography study can lead to a more comprehensive approach in evaluating a patient's overall health and potential underlying issues.