yes, vasovagal syncope can occur during myocardial perfusion procedures, specially when adenosine or dypiridamole are employed. Frequent BP and HR monitoring are mandatory in these testing, and interruption of the test should be granted if prodromes of symptoms appear
Sadly, the limitation that I find at Singapore's public or restructured hospitals seem not directed towards cardiac disorder or other organic factors but more on psychogenic factors, for simplicity sake I believe. It would be more comprehensive if such were initiated. But this would not be viable in the next twenty years. It will be of great disadvantage to the patients as we have yet to achieve that patient-doctor mutual respect with regards to our disease management at the moment as the patients have no say to their maladies, suffice to note and agree with the "needed regiment" unless one goes to the private hospitals, which is highly expensive even for a local .
I have seen such incidences occur and the test was continued despite the mentioned symptom prodromes. The idea was to complete the test else, they need to re-do the test again, which would anyway recur - a typical answer I receive.
Can I safely presume, Rio - that should the test be interrupted, the result would most likely be false negative, if the doctors refuse to continue further and decide to end the test instead?
Would the answer be false negative - still, if the test is concluded despite the vasovagal syncope interruption but continued once the patient resume with the adenosine and dypiridamole again and thereafter the imaging part, follow by resting phase and another imaging scan?