An ECG may be helpful in the diagnosis of electrolyte imbalance  occurs as a complication of acute tubular necrosis. Appearance of tall and peaked T waves is the early ECG finding of hyperkalemia.
Acute tubular necrosis electrocardiogram
Acute kidney injury electrocardiogram
Acute tubular necrosis echocardiography or ultrasound
Acute tubular necrosis physical examination
Chronic renal failure x ray
Sarcoidosis electrocardiogram
Hepatorenal syndrome chest x ray
Acute kidney injury echocardiography and ultrasound