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Impact of Chronic Thrombocytopenia on Outcomes After Transcatheter Valvular Intervention and Cardiac Devices Implantation (From a National Inpatient Sample)

      To evaluate the impact of chronic thrombocytopenia (cTCP) on outcomes of transcatheter valvular procedures such as aortic valve implantation (TAVI), MitraClip, permanent pacemaker (PPM), implantable-cardioverter defibrillator (ICD), cardiac resynchronization therapy (CRT), left atrial appendage closure, and pericardiocentesis. Impact of cTCP on clinical outcomes following TAVI, Mitraclip, PPM, ICD, CRT, left atrial appendage closure, and pericardiocentesis procedures is not well described. Utilizing the National Inpatient Sample and (ICD-9-CM) procedural codes, we evaluated patients (age ≥18 years) who underwent these procedures, from January 1, 2009 to December 31, 2014, with or without cTCP as a chronic condition variable indicator. Propensity score matching model implemented to derive 2 matched groups. Propensity score matching created 47,292 and 47,351 hospitalizations matched pairs with and without cTCP, respectively. Patients with cTCP were older (mean age, 74.27 vs 72.26 years; absolute standardized differences [ASD] = 15.6) and less likely to be female (36.76% vs 43.74%, ASD = −14.31). They experienced higher in-hospital mortality (3.0% vs 2.0%; odds ratio [OR], 1.53; 95% confidence interval [CI], 1.27 to 1.83) and higher odds of vascular injury requiring surgery (2.63% vs 1.10%; OR, 2.43; 95% CI, 1.93 to 3.05). Postoperative hematoma and bleeding were 2-fold higher (4.57% vs 2.24%; OR, 2.08; 95% CI, 1.77 to 2.45) and 3-fold higher (6.34% vs 2.45%; OR, 2.69; 95% CI, 2.31 to 3.13) respectively among cTCP patients. They had greater health-care cost ($47,163 vs $35,763, p <0.0001) and longer hospital stay (mean 9.26 days vs 6.84 days, p <0.0001). In conclusion, cTCP patients had higher risk of complications after TAVI, MitraClip, PPM, ICD, CRT, left atrial appendage closure, and pericardiocentesis, including a 1.5-fold increased risk of in-hospital mortality.
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