The rate of arrhythmias on the 24-hour Holter EKG (80.4%): supraventricular arrhythmias (single atrial ventricular tachycardia: 41.2%; double cluster atrial ventricular tachycardia: 15.7%, sinus tachycardia ≥) 50%: 3.9%, paroxysmal supraventricular tachycardia: 5.8%, atrial fibrillation: 9.8%); ventricular arrhythmias (double-ventricular ventricular rate: 11.8%, tripartite: 7.8%, varied, complex: 7.8%, double beam, triple beam: 5.9%, R / T pattern: 3.9%, unstable ventricular tachycardia: 6.9%).