Safety of regadenoson positon emission tomography stress testing in orthotopic heart transplant patients
We sought to determine the safety of regadenoson (REG) stress testing in patients who have undergone orthotopic heart transplantation (OHT).
Routine screening for cardiac allograft vasculopathy (CAV) is necessary after OHT. Adenosine stress is contraindicated after heart transplantation due to supersensitivity in denervated hearts. Safety of regadenoson stress following OHT has not been well studied.
We retrospectively reviewed data from OHT patients (N = 123) who were referred to REG stress testing. Medical records were reviewed to determine hemodynamic and ECG response to regadenoson and to identify adverse reactions.
No serious adverse events occurred. No life-threatening arrhythmias or hemodynamic changes occurred. Common side-effects related to regadenoson were observed, dyspnea being the most frequent (66.7%). On average the heart rate rose from 82.8 ± 12 to 95.7 ± 13.4 bpm (P < 0.001), systolic blood pressure decreased from 138.7 ± 20.9 to 115.9 ± 23.9 mmHg (P < 0.001) and mean arterial pressure decreased from 103.5 ± 14.1 to 84.72 ± 15.90 mmHg (P < 0.001) during stress protocol. There was no sustained ventricular tachycardia, ventricular fibrillation, or second-or third-degree atrioventricular block.
Regadenoson stress testing appears to be well tolerated and safe in OHT patients.
KeywordsPositon emission tomography pharmacologic stress cardiac transplantation regadenoson safety heart failure
Cardiac allograft vasculopathy
Orthotropic heart transplant
Coronary intravascular ultrasound
Positron emission tomography and myocardial perfusion imaging using regadenoson
Dr. Murthy is supported by 1R01HL136685 from the National, Heart, Lung, and Blood Institute. Dr. Murthy has received consulting/speaking fees from Bracco Diagnostics and Ionetix. Dr. Murthy owns stock in General Electric.
Keith Aaronson has received consultant or speaking fees from Medtronic, NuPulseCV and has stock options with ProCyrion and NuPulseCV. He has received grants or grants pending from Amgen, Medtronic and Thoratec. Venkatesh L. Murthy has received consulting/speaking fees from Bracco Diagnostics and Ionetix. He owns stock in General Electric. John J. Lazarus, Ashraf Saleh, Michael Ghannam, Monica Colvin, Frank Pagani, Todd Koelling, James R. Corbett, Richard L. Weinberg, and Matthew C. Konerman have no reported conflicts of interest.
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