| The Relationship between Pulmonary
Vein Extension and Atrial Fibrillation after Coronary Artery
Bypass Grafting |
(Department of Cardiovascular Surgery, Chugoku Rosai
Hospital, Kure, Japan)
| Saihou Hayashi |
Masafumi Sueshiro |
Tomokuni Furukawa |
|
The cause of atrial fibrillation
(AF) after coronary artery bypass grafting (CABG) is not clear
yet. Speculating that the extension of pulmonary vein (PV) would
induce AF after CABG, we analyzed 39 cases in which a Swan-Ganz
catheter was inserted at the onset of AF. The cardiac index (CI),
systolic pulmonary artery pressure (sPA), diastolic pulmonary
artery pressure (dPA) were measured continuously after operation.
The “occupation index” was defined as “(value just before the
AF onset－minimum value)/(maximum value－minimum value)×100%.”
The mean values of the occupation index for CI, sPA and dPA were
16±30%, 77±36%, 76±38% (mean±SD) respectively. Furthermore, cases
in which CI just before the AF onset showed a minimum value in
all the collected data consisted of 27 of the 39 cases (69%),
and sPA/dPA just before the AF onset showed a maximum value in
all the collected data in 26/25 of the 39 cases (67%, 64%). About
two-thirds of AF cases occurred in the descending phase of CI,
and in the ascending phase of sPA/dPA. We considered these conditions
to be equivalent to the extension condition of PV and surmised
that PV extension might be one of the causes of AF after CABG.
Jpn. J. Cardiovasc. Surg. 34: 103-106 (2005) |
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