59-year-old with unstable angina who has just returned to the unit after having a heart catheterization with balloon angioplasty.

56-year-old client with chronic stable angina who is due to receive a dose of nifedipine.

Client who is post coronary artery bypass with potassium 4.2 mEq/L.

65-year-old who had a myocardial infarction (MI) 4days ago and is anxious about the planned discharge.