Browse Guides  internal medicine  cardiology

Myocardial infarction

Prevalence
Clinical features
Differential diagnosis
Investigations
Therapy
Prevention
Prognosis
Therapy

Give the following at half-strength with abciximab and heparin. a    

Why?

  • Half-dose tenecteplase a or reteplase a  with abciximab and heparin compared with full-dose tenecteplase or reteplase   with heparin reduces reinfarction and refractory ischaemia in hospital, but increases the risk of major haemorrhage and thrombocytopenia. 
  • The addition of abciximab and heparin compared with enoxparin reduces refractory ischaemia but leads to more major haemorrhage and thrombocytopenia. a  

Adding enoxaparin to tenecteplase leads to less reinfarction and refractory ischaemia than adding heparin

Patient Treatment Comparison Outcome CER RRR
(95% CI)
NNT
(95% CI)
myocardial infarction a   half-dose tenecteplase and abciximab and heparin full-dose tenecteplase and unfractionated heparin inhospital reinfarction
at 30 days
4.2% 48%
(26% to 64%)
49
(32 to 100)
      inhospital refractory ischaemia
at 30 days
6.5% 51%
(34% to 63%)
30
(22 to 50)
      major bleeding
at 30 days
2.2% -100%
(-190% to -40%)
-46
(-94 to -31)
      thrombocytopenia
at 30 days
1.3% -140%
(-270% to -53%)
-54
(-110 to -36)
  full-dose tenecteplase and enoxaparin half-dose tenecteplase and abciximab and heparin inhospital refractory ischaemia
at 30 days
3.2% -54%
(-99% to -6%)
-70
(-410 to -38)
      major bleeding
at 30 days
4.3% 29%
(2% to 48%)
81
(42 to 1300)
      thrombocytopenia
at 30 days
3.2% 63%
(40% to 76%)
50
(35 to 92)
 

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