The Effect of Media Campaigns, Patient Characteristics, and Presenting Symptoms on Prehospital Delay in Myocardial Infarction Patients: A Prospective Cohort Study.

BACKGROUND: Delays in reperfusion therapy for myocardial infarction (MI) are associated with increased mortality and morbidity, and most of this delay is due to delay in patients initiating contact with emergency services. This study assesses the impact of the Australian National Heart Foundation media campaign and identifies patient characteristics and presenting symptoms that may contribute to delay. METHODS: This prospective cohort study identified patients with a diagnosis of MI admitted to a single tertiary metropolitan hospital in Perth, Western Australia from July 2013 to January 2014. Patients were interviewed and responses were categorised to determine their reasons for delaying treatment and the impact of mass media campaigns. Delay times were analysed using multivariable linear regression models for the Whole Cohort (all patients admitted to the tertiary hospital, including patients from rural and peripheral hospitals) and the Direct Admission Cohort (patients admitted directly to the tertiary hospital). RESULTS: Of 376 patients, 255 patients provided consent, and symptom onset-time was available for 175 patients. While almost two thirds of the cohort was aware of media campaigns, awareness was not associated with decreased prehospital delay. Median delay was 3.9hours for the Whole Cohort and 3.5hours for the Direct Admission Cohort. Delay was associated with being widowed, symptom onset on a weekday compared with weekend, past medical history of MI and coronary artery bypass graft, private compared with ambulance transport to hospital, and lack of symptoms of sweating and weakness. In addition, for the Direct Admission Cohort, age and income were also associated with delay. CONCLUSIONS: This study did not find an association between awareness of media campaigns and delay. This study identified important characteristics and presenting symptoms that are associated with delay, and possibly relevant to future media campaigns.

Myocardial infarction, patient decision delay and help-seeking behaviour: a thematic analysis.

AIMS AND OBJECTIVES: To explore patient decision delay, the symptom experience and factors that motivated the patient experiencing myocardial infarction to go to the emergency department. BACKGROUND: Reperfusion for myocardial infarction is more effective if performed as soon as possible after the onset of symptoms. Multiple studies show that prehospital delay is long and can average several hours. DESIGN: A qualitative descriptive design using semi-structured interviews. METHODS: All consecutive myocardial infarction patients who between July 2013-January 2014 at a single-centre metropolitan tertiary hospital in Western Australia were included. Patient responses to an open-ended question were recorded and transcribed verbatim. Data were analysed using Braun & Clarke (Qual Res Psychol, 3, 2006, 77-101) thematic analysis method. RESULTS: Of the 367 eligible, 255 provided consent. Three themes emerged from the qualitative analyses: (1) onset and response to symptoms, and this included three subthemes: context of the event, diversity of symptom interpretation and response to symptoms; (2) help-seeking behaviour, and this included the patient seeking help from various lay and professional sources; and (3) help-seeking outcomes, which include calling the emergency ambulance, going to emergency department, seeing a general practitioner, seeing a general practitioner who advised them to go home. CONCLUSION: The context of the event, their symptomatology and the layperson who was the first point of contact influenced the decision for the patient to go to the emergency department. Many patients used private transport or contacted their general practitioner. New knowledge from this study emphasises the importance of the layperson understanding the appropriate response is to seek prompt care through immediate emergency transport by ambulance to emergency department. RELEVANCE TO CLINICAL PRACTICE: This study highlights the need to educate both the patient and the wider public, not only to seek prompt care but to also to call the emergency ambulance to arrange transport to the emergency department.