DDDR


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DDDR

Cardiology A formal mode designation–atrial and ventricular pacing, atrial and ventricular sensing, dual response and rate-adaptive, used for dual chamber pacemakers. See Dual-chamber pacemaker. Cf VVIR.
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Abbreviations SSS --sick sinus syndrome SND --sinus node dysfunction ASD --atrial septal defect ECG --electrocardiogram DDDR --dual chamber rate adaptive pacemaker CHD --congenital heart disease SVASD --sinus venosus atrial septal defect https://doi.org/10.2298/MPNS1706167D
At the 1-month follow-up visit, all implanted patients performed a treadmill exercise test to determine their normal sinus function while programmed in DDDR mode and sensor passive mode.
Pacemakers of all the eligible patients were programmed to have: (1) A lower rate limit of 60 beats/min; (2) a maximum sensor rate equal to the maximum predicted heart rate (220−age); and (3) DDDR therapy mode; (4) dynamic atrioventricular delay mode was programmed ON, providing a shorter atrioventricular delay at faster heart rate; (5) recording method was programmed to high resolution at which setting the ventricular rate was averaged and recorded every 16 s and the ACC and MV raw sensor data were collected; (6) the sensor response factors were programmed passive during the treadmill testing and converted to the default settings of ACC = 8, MV = 3 when analyzing the SIR data; (7) the baseline sensor rate was set accordingly with the sinus rate at rest.
Of 40 pacemakers 15 were programmed to VVIR, 11 DDDR, 7 DDD, and 7 VDDR modes.
Study included Sigma Series (Medtronic Inc) pacemakers: 15 were in VVIR mode, 11 were in DDDR mode, 7 were in DDD mode, and 7 in VDDR mode.