11 Jun WHAT CHANGES MAY HAVE TO BE MADE TO THE PATIENT’S EXERCISE REGIMEN IN VIEW OF THE RESIDUAL 75% BLOCKAGE IN HER LEFT CIRCUMFLEX CORONARY ARTERY?
What changes may have to be made to the patient’s exercise regimen in view of the residual 75% blockage in her left circumflex coronary artery?
Medical History
Ms. RW is a 58-yr. old woman with no prior history of heart disease. She has hypertension under good control with medications and was diagnosed with diabetes 15 yr. ago. Her last fasting blood glucose was 234 mg/dl, and her HbA1c was 8.7%. She is a former smoker (quit 10 years ago) and leads a rather sedentary lifestyle as a computer analyst for a large local firm. Over the past 3 months she has started to notice increased shortness of breath when climbing two flights of stairs at work; at the top of the stairs, she feels some moderate chest pressure that resolves in a couple of minutes after she sits down at her desk. Her primary care physician sends her for a routine exercise stress test.
Exercise Test Results: She exercises on a standard Bruce protocol. At 4:30 min there is some horizontal ST depression, about 1 mm in inferior and lateral leads; by peak exercise (5:20) it is about 2 mm downsloping in the same leads, and she is developing chest pressure she described in her symptom history. ECG changes resolve by 10 min of recovery, and symptoms resolve in about 5 minutes of recovery.
Resting ECG: Appears normal
Heart rate: 65 bpm
Blood pressure: 138/92 mmHg
Heart and lung sounds: within normal limits
Diagnosis: Severe two-vessel CAD. Stenting was performed to 95% occluded proximal left anterior descending coronary artery lesion. Ms. RW’s 75% occluded distal left circumflex lesion was not a candidate for revascularization at the time of the procedure.
Medications: Metoprolol (beta-blocker) 50 mg twice daily; linsinopril (ACEi) 10 mg once daily, asprin, plavix (anti-platelet), and simvistatin.
1) What changes may have to be made to the patient’s exercise regimen in view of the residual 75% blockage in her left circumflex coronary artery?
2) As she hits a plateau in her ability to increase her intensity of aerobic exercise that is not due to further complications with her heart, what issues may be limiting her ability to increase her exercise intensity?
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