These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Usefulness of width and amplitude of P wave for prognosis of the efficacy of atrial sensing in patients with an implanted VDD pacemaker].
    Author: Lelakowski J, Czunko A, Szczepkowski J.
    Journal: Pol Merkur Lekarski; 2009 Sep; 27(159):188-91. PubMed ID: 19827726.
    Abstract:
    UNLABELLED: VDD stimulation is accepted as alternative mode of cardiac pacing to DDD in patients with atrio-ventricular (AV) conduction block and preserved sinus node function (SA). AIM OF THE STUDY: An attempt has been made to determine the relationship between width and amplitude of the P wave obtained during assessment the patient for the implantation procedure and the effectiveness of AV synchronization (PAS). MATERIAL AND METHODS: The study involved a group of 65 patients (43 male, 22 female), aged 66.6 +/- 12.7 with clinically significant disturbances of AV conduction, who did not reveal symptoms of concomitant disturbance in SA node automaticity. The width and amplitude of the P wave of the surface ECG were studied prior to the implantation procedure. Follow-up was carried out 3-4 days and 1, 3, 6 and 12 months after the procedure. The effectiveness of PAS was estimated by event counter read-out. RESULTS: Over the 12-month follow-up, the average value of the PAS coefficient was 95% for the entire group of patients. In 74% (subgroup A) synchronization was highly effective (PAS > or = 95%); in the remaining 26% (subgroup B) PAS occasionally fell below 95%. A statistically significant correlation between the width of the P wave of the surface ECG and the effectiveness of PAS was clearly demonstrated. In subgroup B, P wave was longer than in subgroup A (105 +/- 16 vs. 94 +/- 14 ms; p < 0.005). The width of P wave above 100 ms was the cutoff value of the ROC curve predicting PAS < 95%. CONCLUSIONS: The width of P wave obtained from surface ECG is correlated with effective AV synchronization. The value above 100 ms was predisposed to atrial undersensing.
    [Abstract] [Full Text] [Related] [New Search]