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Use of atropine in patients with recent myocardial infarction during exercise myocardial perfusion study

Use of atropine during exercise myocardial perfusion SPECT

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Abstract

Background: Patients with recent myocardial infarction frequently require a myocardial perfusion study for risk stratification. However a conclusive study cannot be accomplished in many due to non-attainment of target heart rate. Aim of the study: To evaluate the effect of pre-stress administration of atropine in exercise performance of patients with recent myocardial infarction. Material and methods: Study included 43 test and 43 control patients and were matched for their age, sex, status of pretest exercise tolerance, area of infarction and for interval between infarction and stress thallium test. Atropine (0.01 mg/kg) was administered intravenously 3 min prior to treadmill stress in all the 43 test patients and no atropine was administered to control patients. Results: Target heart rate was attained in 95.3% patients receiving atropine compared to in 67.4% of control patients. There was no significant difference between mean ages (p>0.33), basal BP (p>0.47), peak BP (p>0.18) of both groups. There was significant difference between the increment in exercise-induced heart rate (p<0.004), peak heart rate (p<0.001) and double product (p<0.001) attained between both groups. No significant adverse effect was noted in patients who received atropine. Conclusion: Pre-stress administration of atropine in patients with recent myocardial infarction is safe and results in a significantly better exercise performance, which might be useful in decreasing the number of equivocal myocardial perfusion studies.

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Authors and Affiliations

  1. Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India

    S. Barai, C. D. Patel, A. Malhotra, G. P. Bandopadhayaya, R. Kumar & H. Dhanapathi

  2. Department of Nuclear Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India

    S. Gambhir

  3. Sukanta Barai, Type 4 Quarter no-18, SGPGI Complex, Rae-Barelli Road, Lucknow, UP, 226 014, India

    S. Barai

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  1. S. Barai
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  2. C. D. Patel
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  3. A. Malhotra
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  4. G. P. Bandopadhayaya
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  5. S. Gambhir
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  6. R. Kumar
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  7. H. Dhanapathi
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Correspondence to S. Barai.

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Barai, S., Patel, C.D., Malhotra, A. et al. Use of atropine in patients with recent myocardial infarction during exercise myocardial perfusion study. Int J Cardiovasc Imaging 21, 413–419 (2005). https://doi.org/10.1007/s10554-004-7984-0

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  • DOI: https://doi.org/10.1007/s10554-004-7984-0

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