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. 2021 Jul 12;10(14):3071. doi: 10.3390/jcm10143071

Table 2.

Risk stratification regarding cardiac events during physical activity and exercise training in ebCR [2,15,37].

Low risk (all listed findings must apply)
Findings/Results of the graded exercise testing:
  • No complex ventricular arrhythmias under increasing exercise and in the recovery phase.

  • No angina or other significant symptoms (e.g., unusual shortness of breath, light-headedness, or dizziness) under increasing exercise or recovery or in the recovery phase

  • Normal hemodynamics under increasing exercise and in the recovery phase (e.g., adequate heart rate increase and recovery, adequate increase in systolic blood pressure under increasing exercise, and decrease in the recovery phase).

  • Exercise capacity ≥ 7 METs (≥1.8 watts/kg body weight).

Other findings:
  • No significant left ventricular dysfunction (EF ≥ 50%).

  • uncomplicated course after myocardial infarction, bypass surgery or after elective coronary revascularization

  • No complicated ventricular arrhythmias at rest

  • No signs of heart failure

  • No signs of residual ischemia

  • No clinically relevant depression

Moderate risk (if diagnosed with one or more of the listed findings)
Findings/Results of the graded exercise testing:
  • Onset of angina or other significant symptoms (e.g., unusual shortness of breath, light-headedness, or dizziness at higher exercise intensities (<7 METs (<1.4 watts/kg body weight)) during exercise testing

  • Onset of mild or moderate silent ischemia during exercise testing or in the recovery phase (ST-segment depression < 2 mm from baseline)

  • Exercise capacity <5 METs (<1.2 watts/kg body weight)

Other findings:
  • Moderately impaired left ventricular function (EF 40–49%).

High risk (if diagnosed with one or more of the listed findings)
Findings/Results of the graded exercise testing:
  • Complex ventricular arrhythmias during exercise testing or in the recovery phase.

  • Angina or other significant symptoms (e.g., unusual shortness of breath, light-headedness, or dizziness) at low exercise intensity (≤5 METs; 1.2 watts/kg body weight) during exercise testing and during the recovery phase

  • Myocardial ischemia during exercise or in the recovery phase (ST-segment depression ≥ 2 mm)

  • Pathological hemodynamics during exercise (e.g., chronotropic incompetence, flattening/decrease in systolic blood pressure during exercise) or in the recovery phase (e.g., severe post-exercise hypotension).

Other findings:
  • reduced left ventricular function (EF < 40%)

  • condition after cardiac arrest or resuscitation

  • complex arrhythmias at rest or during exercise

  • myocardial infarction, cardiac surgery, or interventional coronary revascularization with consecutive shock or residual ischemia

  • pulmonary hypertension

  • condition after ICD implantation

  • condition after CRT implantation

  • condition after VAD implantation

  • condition after heart transplantation (clinically stable)

  • clinically relevant depression

  • congenital heart disease and valvular heart disease require special individual cardiac assessment and consideration