Tier 1 Longitudinal Case
Back From the Brink With Intensive Risk-Factor Modification
A severely abnormal baseline worsened over eight years, then improved dramatically after lifestyle and medical intensification
Serial CPET Timeline
2012
Heart Failure
Initial risk assessment
Peak VO₂
67% predicted
IT Status
IT at HR 115 bpm
Stress ECG
No ST depression reported
Severely reduced O₂-pulse and peak BP 220/96 mmHg
May 2020
Heart Failure
Symptomatic return
Peak VO₂
55% predicted
IT Status
IT at HR 121 bpm
Stress ECG
No ST depression or ventricular ectopy
Worsening dyspnea and fatigue with major physiologic decline
Oct 2020
Subclinical
Five-month reassessment
Peak VO₂
98% predicted
IT Status
IT at HR 100 bpm
Stress ECG
Unremarkable stress ECG
Peak VO₂ nearly doubled with weight loss, exercise and medication intensification
Interventions Between Tests
- Home cycling in the prescribed Zone 2 for 150 minutes per week
- Beta-blocker, statin, SGLT2 inhibitor and aspirin were added
- Patient lost 32 pounds over five months with major lifestyle change
Clinical Interpretation
- Intermittent exercise slowed but did not stop progression
- Intensive adherence produced a large Peak VO₂ and O₂-pulse improvement
- Persistent dysfunction showed more room for reversal despite major risk reduction
Peer-Reviewed Source
Chaudhry S, Kumar N, Arena R, Verma S. The evolving role of cardiopulmonary exercise testing in ischemic heart disease - state of the art review. Curr Opin Cardiol. 2023 Nov 1;38(6):552-572. doi:10.1097/HCO.0000000000001086
View journal article