Contemporary trends in stroke complicating cardiac catheterisation

Background: Stroke remains an important complication of diagnostic cardiac catheterisation and percutaneous coronary intervention and is associated with high rates of in-hospital mortality. Aims: To evaluate the incidence of stroke over a 10-year period and assess the longterm influence of stroke following cardiac catheterisation and PCI on functional outcomes, based on modified Rankin score and mortality. Methods: The study was performed using a case-control design in a single tertiary referral centre. Patients were identified by correlating those patients undergoing cardiac catheterisation between October 2006 and December 2016 with patients who underwent neuroimaging within 7 days to identify possible cases of suspected stroke or transient ischaemic attack. Results: A total of 21 510 patients underwent cardiac catheterisation during the study period. Sixty (0.28%) patients experienced stroke or transient ischaemic attack. Compared to control patients, those who did experience cerebral ischaemic events were older (70.5 vs 64 years; P < 0.001), with higher rates of atrial fibrillation, hypertension and diabetes mellitus. Stroke complicating cardiac catheterisation was associated with an increased risk of readmission, with a significantly higher hazard of readmission for stroke noted. Despite minimal functional impairment based on modified Rankin score, stroke was associated with a significant risk of early and cumulative mortality. Stroke incidence remained stable over the study period despite changes in procedural practice. Conclusions: The incidence and functional severity of stroke remains low despite evolving procedural practice with a stable incidence over time despite changes in procedural practice; however, post-procedural stroke confirms an increased mortality hazard.