[Direct current cardioversion].
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Atrial Fibrillation↗
Biomedical subjects
Per Dahl Christensen
Publications and source records attributed to Per Dahl Christensen.
Routine transradial coronary angiography in unselected patients.
OBJECTIVES: To measure and compare the results of changing from routine transfemoral to routine transradial coronary angiography performed by a single operator. DESIGN: A learning period of 3 months for the transradial procedure with 43 selected patients was followed by a 12-month routine period with 243 unselected patients. The success and complication rates, contrast volumes, catheter and X-ray times were measured and compared to results of a preceding period where the transfemoral approach was used. Follow-up was performed in the transradial groups 1.5-25 months after the procedure. RESULTS: Of the non-selected patients, 9% were deemed unsuitable for the radial procedure. In the remaining 91% in which the transradial route was attempted, success was achieved in 91%. The complication rate was 2.7%. Increased operator experience reduces catheter and fluoroscopy times. At follow-up, 4.7% of the radial arteries were occluded, but the patients were without clinical sequelae. The occlusion rate was significantly higher with an unsuccessful procedure. CONCLUSIONS: Transradial coronary angiography can be performed safely and with acceptable image quality in non-selected patients after a learning period of 43 cases. Total procedure time is shorter than with the transfemoral approach. There were no bleeding complications and no procedure-related complications that required treatment.
Adult↗
Sinus and paced P wave duration and dispersion as predictors of atrial fibrillation after pacemaker implantation in patients with isolated sick sinus syndrome.
The aim of this study was to prospectively evaluate the sinus and the paced P wave duration and dispersion as predictors of AF after pacemaker implantation in patients with isolated sick sinus syndrome (SSS). The study included 109 (69 women, mean age 72 +/- 11 years) patients with SSS, 59 with bradycardia-tachycardia syndrome (BTS). A 12-lead ECG was recorded before pacemaker implantation and during high right atrial and septal right atrial pacing at 70 and 100 beats/min. The ECGs were scanned into a computer and analyzed on screen. The patients were treated with AAIR (n = 52) or DDDR pacing. The P wave duration was measured in each lead and mean P wave duration and P wave dispersion were calculated for each ECG. AF during follow-up was defined as: AF in an ECG at or between follow-up visits; an atrial high rate episode with a rate of > or =220 beats/min for > or =5 minutes, atrial sensing with a rate of > or =170 beats/min in > or =5% of total counted beats, mode-switching in >/=5% of total time recorded, or a mode switching episode of > or =5 minutes recorded by the pacemaker telemetry. The ECG parameters were correlated to AF during follow-up. Mean follow-up was 1.5 +/- 0.9 years. None of the ECG parameters differed between patients with AF and patients without AF during follow-up, nor was there any difference between groups after correction for BTS and age. BTS was the strongest predictor of AF during follow-up (P < 0.001). P wave duration and dispersion measured before and during pacemaker implantation were not predictive of AF after pacemaker implantation in patients with isolated SSS.
Aged↗