Table 2.

Grouping of the studies by the similarity of pathology.

Group nomenclature	Pathologies present in the studies
Changes in heart rate	Arrhythmia, Atrial fibrillation, Idiopathic ventricular arrhythmia, Postoperative atrial fibrillation, Ventricular arrhythmia
Myocardial dysfunction/pathologies	Acute myocardial infarction, Left ventricular hypertrophy, Myocardial infarction, Posterior myocardial infarction, Premature ventricular contraction
Other cardiovascular pathologies	Abnormal cardiac conditions, Amyloidosis, Aortic regurgitation, Cardiovascular diseases, Congestive heart failure, Coronary artery, Heart failure, Hypertrophic cardiomyopathy, Left atrial enlargement, Obstructive sleep apnea (OSA)