pyrophosphate and Atrial-Fibrillation

Topics: Atrial Fibrillation; Bone and Bones; Diphosphates; Humans; Technetium; Technetium Tc 99m Pyrophosphate

Transthyretin cardiac amyloidosis (ATTR-CA) is an increasingly recognized disease, in which atrial fibrillation (AF) has been shown to be prevalent. Cardiac scintigraphy with technetium-99m-pyrophosphate (99mTc-PyP) labeled bone-seeking tracers is used to noninvasively make the diagnosis of ATTR-CA, based on ventricular myocardial uptake. Assessment of atrial wall uptake (AU) on 99mTc-PyP is currently not used in the clinical setting Methods: We analyzed a cohort of patients referred for 99mTc-PyP scan at a tertiary center to explore AU and associations between any and incident AF, ATTR-CA, and all-cause mortality.. Among 580 patients included, 296 patients (51%) had a diagnosis of AF; 164 patients (28%) had scans consistent with ATTR-CA while 117 patients (20%) had AU. Of 117 patients with AU, 107 (91%) had any AF. In contrast, of 463 patients without AU 191(41%) had any AF. Of those with AU, 59/117(50%) patients had a 99mTc-PyP diagnosis of ATTR-CA while 58/117(50%) patients did not have such a diagnosis (. In a consecutive cohort of patients undergoing 99mTc-PyP scans, 20% had AU, which was statistically associated with any AF, independently of ATTR-CA diagnosis and sex. AU was associated with significantly lower freedom from incident AF at 1-year. Overlooking AU on 99mTc-PyP scans could potentially miss an earlier disease manifestation, or an additional risk factor for any/incident AF.

Topics: Atrial Fibrillation; Cardiomyopathies; Diphosphates; Heart Atria; Humans; Prealbumin; Radionuclide Imaging; Stroke Volume; Technetium; Technetium Tc 99m Pyrophosphate; Ventricular Function, Left

Topics: Atrial Fibrillation; Diphosphates; Humans; Radionuclide Imaging; Technetium; Technetium Tc 99m Pyrophosphate

Topics: Atrial Fibrillation; Diphosphates; Humans; Radionuclide Imaging; Technetium; Technetium Tc 99m Pyrophosphate

Topics: Amyloidosis; Atrial Fibrillation; Cardiomyopathies; Diphosphates; Heart; Humans; Technetium Tc 99m Pyrophosphate