High New York Heart Association (NYHA) functional class |
Reduced left ventricular ejection fraction |
Diastolic dysfunction |
Right ventricular dysfunction |
Reduced right ventricular ejection fraction |
Right ventricular enlargement |
Tricuspid regurgitation |
Low peak VO2 with maximal exercise |
Exercise hemodynamics |
Resting sinus tachycardia |
Signs of reduced tissue perfusion |
Low mean arterial pressure |
Renal insufficiency |
Neurohumoral activation |
Hyponatremia due to increased antidiuretic hormone secretion |
Increases in plasma renin, norepinephrine, brain natriuretic peptide, and big endothelin-1 |
Comorbid factors |
Diabetes mellitus |
Ischemic heart disease, including extent of coronary artery disease |
Additional predictors |
Echocardiographic findings |
Hemodynamic parameters |
Increase in pulse pressure |
Low heart rate response to exercise |
Reduced heart rate variability |
Hematologic abnormalities |
Low lymphocyte percentage |
White blood cell count above 7000/µL in ischemic cardiomyopathy |
Erythrocyte sedimentation rate above 15 mm/h |
Other |
Left bundle branch block |
Depression |
Mutant allele of the adenosine monophosphate deaminase 1 gene |
Nocturnal Cheyne-Stokes respiration |
More than 30 apneic or hypopneic episodes per hour |
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