Cardiomyopathy can be separated into primary (genetic, mixed…

Cardiomyopathy can be separated into primary (genetic, mixed, or acquired) and secondary categories, which result in varied phenotypes including dilated, hypertrophic, and restrictive patterns. Hypertrophic cardiomyopathy is the most common primary cardiomyopathy, and can cause exertional dyspnea, presyncope, atypical chest pain, heart failure, and sudden cardiac death. Hypertrophic cardiomyopathy is defined as:

A 60 year old man with stage 3 chronic kidney disease (CKD),…

A 60 year old man with stage 3 chronic kidney disease (CKD), secondary to hypertension, presents to your clinic for a routine follow-up appointment.  His BP is 136/74 mmHg.  His PE results were all within normal limits. His labs are significant for a potassium level of 5.3 mEq/L and phosphorus level of 5 mg/dl. What is the explanation for his hyperkalemia and hyperphosphatemia?