P-wave duration and dispersion in patients with obstructive sleep apnea

Increased sensitivity of prolonged P-wave during exercise stress test in detection of angiographically documented coronary artery disease

“…Recent observations confirm the hypothesis that increased LV filling pressure (due to myocardial ischemia/damage, the presence of arterial hypertension, increased blood volume in the case of overweight/obesity) affects P-wave morphology in resting electrocardiography [8][9][10]. In our study, we found higher prognostic value of the increase in DPWD in leads II and/or V 5 for detection of left coronary artery stenosis (vs. right coronary artery).…”

“…Chronic arterial hypertension results in left atrium enlargement and left ventricular (LV) hypertrophy and, in effect, was shown to widen P-wave ≥ 120 ms on electrocardiographic tracings [7]. An increased amount of data also provides evidence for PWD and dispersion changes in obesity and in patients with chronic obstructive sleep syndrome [8,9].…”

The effect of nasal septum deviation on subclinical cardiac autonomic dysfunction

“…These results suggest that the patients in both studies have a tendency for atrial arrhythmia. 25,26 In our study, LVDD, LVSD, IVS thickness, and PW thickness were compared between patients with NSD and the control group with using echocardiography and electrocardiography and no significant difference was found between the groups. Nevertheless, the LA volume established a significant difference between the groups and was higher in the patient group compared to the control group.…”

“…24 Studies have shown that the high rate of AF in OSAS patients indicates the co-occurrence of these two conditions. [24][25][26][27] However, the exact mechanism of AF predisposition in OSAS patients remains unknown. Prolonged intra-and inter-atrial conduction times and inhomogeneous propagation of sinus impulses are common electrophysiological features in AF cases.…”

“…25 The study performed by Can et al was the first clinical report on the effect of P-wave dispersion in OSAS patients and the study divided 67 patients based on their AHI scores following polysomnography: group I; patients with an AHI of <5 and diagnosed as OSAS, group II; patients with an AHI between 5-30; group III; patients with an AHI of >30. 26 All the patients underwent echocardiography and surface electrocardiography and the results indicated that P-wave dispersion was positively correlated with AHI, BMI and mitral early diastolic to late diastolic velocity (E/A) ratio. Moreover, P-wave dispersion was significantly higher in the patients with OSAS compared to patients without OSAS and the study also revealed that the P-wave dispersion for the patients with moderate and severe OSAS were 68.7±6.4 and 67.1±10.8, respectively.…”