Bradycardia Clinical Trial
Official title:
Heart Rate Reducing Therapy With Ivabradine and Bisoprolol Before Coronary Computer Tomographic Angiography in Ambulant Patients
Out-patients scheduled for coronary computer tomographic angiography (CCTA) were screened
regarding their baseline heart rate. If heart rate was > 75, patients were pretreated with
10mg bisoprolol (group 1) or 10mg bisoprolol plus 7.5mg ivabradine (group 2) to reduce heart
rate one our before CCTA was performed.
Heart rate, additional use of i.v. bradycardic agents, motion artefacts, radiation dose and
drug tolerance was monitored.
Aim of the study is to evaluate if ivabradine, an inhibitor of the funny channel (If), in
addition to bisoprolol is effective in lowering heart rate before coronary computer
tomographic angiography (CCTA) if administered orally one hour before the scan.
Out-patients of a single radiology center are included in this retrospective analysis. All
patients are referred to an ambulant CCTA. All scans are performed with a Siemens Somatom
Sensation Cardiac 64 Computer Tomograph and analyzed with Siemens Syngo Plaza software.
Patients with an initial heart rate of ≥ 75 bpm are either pretreated with bisoprolol 10mg
p.o. alone (group 1) or a combination of bisoprolol 10mg and ivabradine 7.5mg p.o. (group 2)
one hour before the CT scan.
The change in treatment from bisoprolol only to the combination of bisoprolol and ivabradine
was introduced as a change in standard treatment independent of the study. The study was only
plannend and performed as a retrospective analysis after the last patient included into the
analysis was already treated.
Additional betablocker is administered intravenously right before the scan if heart rate
remains elevated.
The hypothesis is that the addition of ivabradine to bisoprolol results in a pronounced heart
rate reduction. This heart rate reduction will lead to a reduced need of i.v. bradicardic
drug use, a reduction in motion artifacts and a reduced radiation dose to to a higher rate of
flash sequences.
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