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Previous Cardiovascular Disease, Cardiovascular Risk Factors and Chest Pain in First Myocardial Infarction

1. oktober 2015 opdateret af: Emily Herrett, London School of Hygiene and Tropical Medicine

MI as the First Manifestation of Coronary Heart Disease: Distribution of Previous Cardiovascular Disease, Cardiovascular Risk Factors and Chest Pain in First MI

Some myocardial infarctions (MI) occur as the first manifestation of atherosclerotic disease. Such MIs are important because of the high likelihood of missed opportunities for prevention. A recent analysis using CALIBER data estimated this proportion at 60%.

Further to this research, another level of complexity can be added to improve our understanding of these MIs. This is the concept of a completely 'unanticipated' MI, which can be defined as: MI occurring as the first manifestation of atherosclerotic disease and without any traditional cardiovascular risk factors and without any prior chest pain. Such 'unanticipated' MIs cannot be foreseen by the medical profession and their frequency in the population is unknown.

Therefore the aim of this study is to describe the distribution of previously diagnosed cardiovascular disease, cardiovascular risk factors and chest pain in patients with first MI. This will provide an estimate of the number of 'unanticipated' MIs and of the levels of risk factors in unheralded, compared to heralded MI.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

This study is part of the CALIBER (Cardiovascular disease research using linked bespoke studies and electronic records) programme funded over 5 years from the NIHR and Wellcome Trust. The central theme of the CALIBER research is linkage of the Myocardial Ischaemia National Audit Project (MINAP) with primary care (GPRD) and other resources. The overarching aim of CALIBER is to better understand the aetiology and prognosis of specific coronary phenotypes across a range of causal domains, particularly where electronic records provide a contribution beyond traditional studies. CALIBER has received both Ethics approval (ref 09/H0810/16) and ECC approval (ref ECC 2-06(b)/2009 CALIBER dataset).

Using data from GPRD, MINAP, ONS mortality data and Hospital Episode Statistics (HES), this study will identify patients with a first MI (STEMI and non-STEMI). Information from in-patient hospital visits, general practice data and self-reported data in MINAP, this study will allow the quantification of the level and timing of cardiovascular disease before first MI. It will also measure the levels of cardiovascular risk factors and chest pain occurring before MI.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

9000

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

      • London, Det Forenede Kongerige, WC1E 7HT
        • London School of Hygiene and Tropical Medicine

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

The study population is comprised of patients registered at those GPRD practices that agreed to the linkage with the MINAP database, and whose practices are "up to standard" according to GPRD criteria. Practices taking part in the GPRD are chosen to be representative of all UK practices, and 98% of people in the UK are registered with a GP. Therefore the GPRD should be a representative sample of the UK population.

Beskrivelse

Inclusion Criteria:

  • Patients in GPRD practices which are deemed "up to standard" by GPRD criteria will be included if their practice agreed to be linked to the MINAP dataset.
  • Age over 18.

Exclusion Criteria:

  • Patients will be excluded after experiencing their first MI.
  • Patients will be excluded if they do not fulfil one of the inclusion criteria.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
GPRD patienter
Alle patienter, der er inkluderet i "op til standard" GPRD-praksis, der accepterede koblingen til MINAP-databasen, er inkluderet i denne kohorte.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
First myocardial infarction (MI)
Tidsramme: Average time frame: up to 20 years
Average time frame: up to 20 years

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. september 2009

Primær færdiggørelse (Faktiske)

1. december 2013

Studieafslutning (Faktiske)

1. december 2013

Datoer for studieregistrering

Først indsendt

21. juni 2011

Først indsendt, der opfyldte QC-kriterier

22. juni 2011

Først opslået (Skøn)

23. juni 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

2. oktober 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. oktober 2015

Sidst verificeret

1. oktober 2015

Mere information

Begreber relateret til denne undersøgelse

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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