Saves the questions and what to expect into your notes, next to the visit they belong to.
Keep this study
Lead
Abbott Medical Devices
Age
18–any
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
Implanted with a functioning SJM Quadripolar CRT Pacing System
QRS duration \> 140 ms
Left bundle branch block documented
Ability to provide informed consent for study participation
Willing to comply with the study evaluation requirements
At least 18 years of age
You may not be if
CRT Pacing System implanted less than 1 week at time of enrollment
CRT Pacing System implanted more than 24 months at time of enrollment
CRT Pacing System implanted more than 90 days at time of enrollment AND intrinsic QRS duration is shorter than pre-implant intrinsic QRS duration by more than 10 ms
Resting ventricular rate \>100 bpm
Intrinsic PR interval \> 300 ms
Paroxysmal or persistent atrial tachycardia or atrial fibrillation documented
A recent myocardial infarction, ablation, drug intoxication, electrolyte imbalance, or any condition within the last 90 days that would be contraindicated for CRT programming changes in the opinion of the investigator
Women who are pregnant or who plan to become pregnant during the study
