QJM vol. 97 no. 10 © Association of Physicians 2004; all rights reserved.
Reducing call-to-needle times: the critical role of pre-hospital thrombolysis
1Department of Cardiology, Aberdeen Royal Infirmary and 2Kemnay Medical Group/Scottish Council for Postgraduate Medical and Dental Education, UK
Received 31 March 2004 and in revised form 17 June 2004
Background: Current guidelines recommend that patients with acute myocardial infarction should receive thrombolysis within 60 min of seeking professional help.
Aim: To compare current rates of pre-hospital thrombolysis in Grampian with historical data, and assess the effect of pre-hospital thrombolysis on the proportion of patients achieving call-to-needle times within national guidelines.
Design: Prospective audit.
Methods: Data were collected on all patients (n = 535) admitted to the coronary care unit and thrombolysed, either in hospital or in the community from July 2000 to June 2002, using standardized forms.
Results: One hundred and thirty-three patients (25%) received pre-hospital thrombolysis and 402 (75%) received in-hospital thrombolysis. This compares with a 19% (195/1046) pre-hospital thrombolysis rate in the mid-1990s (p = 0.005). Median call-to-needle times were 45 min for pre-hospital thrombolysis and 105 min for patients who received in-hospital thrombolysis (p < 0.001). Only 24% (96/396) of patients receiving in-hospital thrombolysis were treated within the recommended guideline, vs. 79% (88/111) of pre-hospital thrombolysis patients (p < 0.001).
Discussion: Pre-hospital thrombolysis rates in Grampian are increasing. Administration of thrombolysis in the community greatly increases the proportion of patients achieving a call-to-needle time of 60 min, with a median time saving of
1 h.
Address correspondence to Dr G. Hillis, Cardiac Research Department, Aberdeen Royal Infirmary, Aberdeen, AB25 2ZN. e-mail: g.hillis{at}abdn.ac.uk