A nurse in a provider's office is collecting data from a client who reports dyspnea and fatigue. The chart listed a past medical history of hypertension, tachycardia, and hypercholesteremia. The patient is on two blood pressure medications and a cholesterol medication. The nurse's assessment finding include tachycardia and edema. The patient reports not taking their medications on a regular basis. Which of the following disorders should the nurse suspect?