An aged male patient with coronary heart disease which had been treated with coronary artery bypass grafts （CABG） and administration of metoprolol, presented paroxysmal vertigo in the previous three weeks. The 24 ho...An aged male patient with coronary heart disease which had been treated with coronary artery bypass grafts （CABG） and administration of metoprolol, presented paroxysmal vertigo in the previous three weeks. The 24 hours synchronic 12- lead dynamic electrocardiography （DCG） revealed many episodes of sinus arrest which mostly were followed by A-V junctional or ventficular escape rhythm, the longest sinus pause lasting more than 14. 5 seconds with no symptom. After withdrawal of metoprolol, the DCG revealed much less episodes of sinus arrest than on-admission, but still some A-V junctional and ventricular escape beats. Sick sinus syndromes was then diagnosed, and a synchronous dual-chamber pacemaker （DDDR） was implanted two weeks after admission.展开更多
Hyperthyroidism always leads to arrhythmias, the rarest example of which is sinus arrest. Sinus arrest secondary to hyperthyroidism is a formidable problem for no consensus on the treatment. Here, we de scribe two cas...Hyperthyroidism always leads to arrhythmias, the rarest example of which is sinus arrest. Sinus arrest secondary to hyperthyroidism is a formidable problem for no consensus on the treatment. Here, we de scribe two cases of patients with hyperthyroidism complaining of syncope and dizziness due to sinus arrest. By aid of implantable pacemaker, a device regarded as providing most effective therapy for bradycardia, we totally resolved their discomforts.展开更多
文摘An aged male patient with coronary heart disease which had been treated with coronary artery bypass grafts （CABG） and administration of metoprolol, presented paroxysmal vertigo in the previous three weeks. The 24 hours synchronic 12- lead dynamic electrocardiography （DCG） revealed many episodes of sinus arrest which mostly were followed by A-V junctional or ventficular escape rhythm, the longest sinus pause lasting more than 14. 5 seconds with no symptom. After withdrawal of metoprolol, the DCG revealed much less episodes of sinus arrest than on-admission, but still some A-V junctional and ventricular escape beats. Sick sinus syndromes was then diagnosed, and a synchronous dual-chamber pacemaker （DDDR） was implanted two weeks after admission.
文摘Hyperthyroidism always leads to arrhythmias, the rarest example of which is sinus arrest. Sinus arrest secondary to hyperthyroidism is a formidable problem for no consensus on the treatment. Here, we de scribe two cases of patients with hyperthyroidism complaining of syncope and dizziness due to sinus arrest. By aid of implantable pacemaker, a device regarded as providing most effective therapy for bradycardia, we totally resolved their discomforts.
