The Nordic Baltic Chronic Total Occlusion (CTO) Arrhythmia Study

"A loop recorder is implanted i all patients in both study groups to investigate:~* Prevalence and severity of cardiac arrhythmias.~* Effect on detected arrhythmia, in particular ventricular tachyarrhythmia, of optimal medical therapy vs. coronary revascularization by PCI.~* Prevalence and severity of cardiac arrhythmias in CTO-patients with failed PCI.~* Indication for prophylactic ICD implantation in CTO-patients treated conservatively or by PCI and after failed PCI.~* Relation of arrhythmias to angina pectoris symptoms (CCS class), Quality of life questionnaire results and presence of myocardial reversible perfusion defects by CMRI."