Study outcomes

The primary outcome was 30-day readmission after index admission. Index admission was defined as the first admission with a diagnosis of SVT without prior admission in a period of 30 days. A readmission was defined as any readmission within 30 days of the index admission. If the patient was readmitted multiple times during the 30 days post-admission, only the first readmission was included.

Secondary outcomes were length of stay (LOS) in the hospital, total charges (in USD), iatrogenic cardiac complications, postprocedural bleeding, cardiac tamponade, hemopericardium, stroke and transient ischemic attack (TIA), and readmission with a primary diagnosis of SVT within 30 days. LOS and total hospital charges were directly coded in the NRD.