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Myocardial infarction

Prevalence
Clinical features
Differential diagnosis
Investigations
Therapy
Prevention
Prognosis
Prevention

Treat cardiac risk factors

Arrange for your patient to attend a structured secondary prevention programme. a

Diet

Encourage patients to eat a Mediterranean-style diet a  

Consider giving patients

  • n-3 polyunsaturated fatty acid supplements a  
  • vitamin E supplements (alpha-tocopherol) a  
Avoid giving beta-carotene a  

Cholesterol

Lower cholesterol levels a even for patients with average levels (cholesterol 4.0 mmol/l to 6.2 mmol/l) a using
  • diet modification: a  encourage patients to eat less fat a  (particularly cholesterol) a  and more oats a,  fish a and soy protein b  
  • a statin a
  • gemfibrozil for patients with a low HDL levels a
  • garlic a

There is no clear benefit from referring your patient to a dietician - self-help material is equally effective. a  

Hypertension

Treat hypertension a  

Smoking

Encourage patients to stop smoking a, and ask nurses a and other staff  a to provide further advice.

Offer buproprion a

Alternatives include

  • nortryptiline a
  • nicotine replacement therapy - a combination works best (e.g. patches a and gum a
  • clonidine - but adverse effects are common a 

Arrange for self-help material and follow-up advice after discharge, with personalised feedback. a

Alternatives include

  • individual counselling a 
  • telephone-based counselling b 
There is no clear benefit from 
  • a exercise programme.   a 
  • anxiolytics    a 
  • silver acetate  d

Exercise

Encourage patients to stay active. a

Offer an exercise rehabilitation programme. a

There is no clear benefit from giving postmenopausal women oestrogen and progestin a  

 

Arrhythmias

Consider giving amiodarone a particularly to patients with ventricular arrhythmias a

Avoid using
  • class I antiarrhythmic agents a particularly class Ic drugs a and lidocaine a
  • sotalol a  

 

Further investigations

Perform stress-testing using any of
  • myocardial perfusion imaging b
  • echocardiography b
  • a symptom-limited c exercise tolerance test looking for b
    • limited exercise duration
    • impaired systolic blood pressure changes
    • impaired systolic blood pressure changes

    Refer all patients for arteriography (followed by PTCA or CABG as required) if they develop a  
    • symptomatic angina pectoris during pre-discharge exercise test 
    • ST changes during exercise, compatible with ischaemia  

 

 

Expiry date: November 2003
Levels of Evidence used in grading these guides

Author   CM   Ball , N   Shenker
Reviewer   S   Straus
CAT Writers   CJ   Wotton , N   Shenker , B   Phillips , CM   Ball