[A comparison of two methods of long-term external ECG telemonitoring in patients after ablation for atrial fibrillation]. / Srovnání dvou metod dlouhodobého externího telemonitorování EKG po ablaci fibrilace síní

AIM: The aim of the study was to compare two methods of long-term ECG monitoring after atrial fibrillation (AF) ablation. METHODS: The study included 279 patients with paroxysmal (n = 163) or persistent (n = 116) AF, who were followed up for 1 year after the first catheter ablation for AF. All patients were provided with episodic ECG recorder for 1 year and instructed to send at least 2 random ECG recordings per day and whenever they sensed symptoms. They were also provided with external loop recorder for 2-3 weeks at 6 and 12 months to enable more continuous ECG monitoring. RESULTS: At the end of 39 ± 12 (12-60) month follow-up, 143 (88%) patients with paroxysmal AF, and 105 (91%) patients with persistent AF, respectively, remained in stable sinus rhythm. The efficacy of episodic recorder expressed as a ratio of patients with identified AF/atrial tachycardia (AT) out of all patients with a documented episode of AF/AT was superior to the efficacy of loop recorder. No AF/AT episode was recorded with the loop recorder that was not also documented by the episodic recorder. Of the patients with the AF/AT recurrence detected by the episodic recorder, the arrhythmia was also revealed by the loop recorder in 70% of the patients after paroxysmal AF ablation (p < 0.001), and in 52% of the patients after persistent AF ablation (p = 0.006). Asymptomatic AF/AT was present in 42 (26%) of patients with paroxysmal AF, and in 28 (24%) patients with persistent AF (p = 0.810). From conventional follow-up unexpected and clinically significant episode of AF/AT that required change in therapy was detected in 9 (5.5%) patients after ablation for paroxysmal AF, and in 4 (3.4%) patients after ablation for persistent FS. CONCLUSION: More episodes of AF/AT after ablation were detected by 1-year daily ECG monitoring using episodic recorder as compared to periodic ECG monitoring with loop recorder. Identification of clinically significant episodes of AF/AT unrecognized from conventional follow-up was low.

[Permanent cardiostimulation in the treatment of heart failure]. / Trvalá kardiostimulace v lécbe srdecního selháiní.

Congestive heart failure is a major health problem reaching epidemic proportions in the industrialized world. Despite significant advances in medical therapy, prognosis still remains dim. Cardiac resynchronization therapy is a novel therapeutic approach in management of heart failure patients. Its goal is the restoration of an impaired cardiac synchrony, which can be found in high number of heart failure patients. Cardiac dyssynchrony is characterized by presence of intra and interventricular conduction delays. Cardiac synchrony can be regained by biventricular stimulation. The procedure consists of a special lead being inserted via coronary sinus to a suitable branch of cardiac veins of the left ventricle in addition to a lead in the right ventricle cavity and right atrium. Several clinical trials have demonstrated that cardiac resynchronization therapy improves functional status and quality of life in majority of patients, as well as renders a favourable impact on prognosis.