P wave dispersion in patients with hyperthyroidism

Aslan O., Kirimli O., Badak Ö., Guneri S., Goldeli O., Comlekci A., ...More

9th Congress of the International-Society-for-Holter-and-Noninvasive-Electrocardiology/International-Congress-on-Cardiac-Pacing-and-Electrophysiology, İstanbul, Turkey, 23 - 27 September 2000, pp.59-64 identifier

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.59-64
  • Dokuz Eylül University Affiliated: Yes


Paroxysmal atrial fibrillation (PAF) is a clinical problem in patients with hyperthyroidism (HyThy). This study aimed to evaluate noninvasive ECG markers of PAF such as P wave dispersion (PWdisp) in patients with hyperthyroidism. Study group consisted of 26 pts with HyThy (19 female, mean age: 50.4+/-10.7) and 18 control subjects (12 female, mean age: 51.8+/-10.4). PAF history was detected in 3 pts with HyThy (11.5%). During follow up (mean 13.2-4.3 months) PAF was observed in 3 pts with HyThy (2 had previous PAF episodes and one new case). Total number of pts with PAF was 4 (15.4%) and all were female (mean age 49.5+/-5.8). There was no PAF episode in control group. PWDisp was longer and RR interval was shorter in pts both with and without PAF than controls whereas P max were similar. PWdisp and Pd Values were similar in pts with and without PAF. All other echocardiographic and electrocardiographic measures were comparable between groups. These data may suggest that increased PWDisp and the occurrence of PAF in pts with HyThy might be related to the existance of an inhomogeneous atrial conduction in pts with HyThy.