The medical record indicates that a patient being treated for a low back strain is taking Lasix for the management of heart failure. During ambulation activities, the patient complains of lightheadedness, fatigue, and weakness. The therapist measures the patient’s vital signs and identifies an irregular pulse. What is the MOST likely explanation?

1.Dehydration
2.Angina
3.Hypernatremia
4.Renal failure



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