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Posts Tagged ‘q waves stemi and thrombolysis’

This  query often  evokes  confusion  among fellows and General physicians .

              The answer is simple .Yes ,  you can.(With few conditions)

  • Thrombolysis  or PCI  is  done  with reference to  the  presence  or absence of ST elevation and chest pain.
  • If there is ongoing chest pain  and  significant new onset ST elevation  thrombolysis or PCI is indicated whether there is associated q  waves or not.

Clinical situations 

 Ischemic  q waves: Q wave can occur  with transmural ischemia which result in electrical stunning and loss of R waves . (Many of them  regenerate this R within few days after STEMI ,  indicating the q  waves can be  ischemic  in origin)

Reinfarction : Patients with  old  MI can develop fresh ST elevation  in q leads due to tachycardia and dyskinetic infarct segment .This group  of patients  should be carefully evaluated before labeling them as  re-infarction

* q RBBB in early hours of  anterior STEMI is fairly common which  may revert later. qRBBB is not a contraindication for re-perfusion .

Final  message

Presence of q waves does not  imply one should not  entertain  thrombolysis or PCI .The decision  to reperfuse  , rather  goes with  presence of  chest pain , ST elevation and  of course  within the  acceptable   time window!

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