Disaster and Emergency Medicine Journal

open access

Vol 6, No 1 (2021)
Research paper
Published online: 2021-02-26
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Is using metaproterenol sulfate reliable in hypertension management during the coronary artery bypass graft surgery in terms of graft patency?

Mehmet Okan Donbaloğlu1, Özcan Gür2, Selami Gürkan2, Eylem Kuday Kaykısız3
DOI: 10.5603/DEMJ.a2021.0006
·
Disaster Emerg Med J 2021;6(1):41-47.
Affiliations
  1. Özel Memorial Hastanesi Antalya, Turkey
  2. Department of Cardiovasculary Surgery, Faculty of Medicine, Namık Kemal University, Tekirdağ, Turkey
  3. Department of Emergency Medicine, Denizli State Hospital, Denizli, Turkey

open access

Vol 6, No 1 (2021)
ORIGINAL ARTICLES
Published online: 2021-02-26

Abstract

INTRODUCTION: Coronary artery bypass graft (CABG) surgery that is a basic revascularization method is used commonly and hypertension appears frequently during and after CABG operations. In the treatment of hypertension, metaproterenol sulfate (MS) is one of the main agents; however, the effects of this agent on grafts are not known at an adequate level. The aim of the present study was to determine whether MS could be used safely in CABG operations by examining its effects on coronary grafts.

MATERIAL AND METHODS: This cross-sectional, prospective, experimental study was conducted at a University hospital. In this study, internal thoracic artery (ITA), radial artery (RA) and saphenous vein (SV) graft materials were studied in organ bath in patients who underwent CABG surgery between 2013 and 2016. In the organ bath, 10-6 phenylephrine was added to the grafts to ensure that the ITA, RA and SV grafts contracted submaximally. Then, by adding MS with the cumulative method, the resulting relaxation results were recorded and dose-response curves were created. The p < 0.05 was considered as significant.

RESULTS: A total of 30 patients were included in the study. The average age of the participants was 59.3 (45–81) years. Minimum 1 and maximum 6 grafts (2.96 in average) were taken from all patients. Relaxation response was formed in the ITA at a rate of 40.49% ± 13.52, in the RA at a rate of 28.41% ± 9.08 and in the SV at a rate of 23.87% ± 8.36 by adding MS with the cumulative method. In the statistical work that was done by comparing the relaxation values among the SV grafts, ITA and RA grafts, it was determined that the efficacy of MS in the SV grafts was significantly lower when compared with the ITA and RA grafts.

CONCLUSIONS: In the present study, it was concluded that the risk of developing vasospasm was low in all three grafts when MS was used in intraoperative and postoperative periods. However, in the long-term, this made us consider that better graft patency rates might be obtained. Multicenter in-vivo studies with larger patient groups are needed to support our findings.

Abstract

INTRODUCTION: Coronary artery bypass graft (CABG) surgery that is a basic revascularization method is used commonly and hypertension appears frequently during and after CABG operations. In the treatment of hypertension, metaproterenol sulfate (MS) is one of the main agents; however, the effects of this agent on grafts are not known at an adequate level. The aim of the present study was to determine whether MS could be used safely in CABG operations by examining its effects on coronary grafts.

MATERIAL AND METHODS: This cross-sectional, prospective, experimental study was conducted at a University hospital. In this study, internal thoracic artery (ITA), radial artery (RA) and saphenous vein (SV) graft materials were studied in organ bath in patients who underwent CABG surgery between 2013 and 2016. In the organ bath, 10-6 phenylephrine was added to the grafts to ensure that the ITA, RA and SV grafts contracted submaximally. Then, by adding MS with the cumulative method, the resulting relaxation results were recorded and dose-response curves were created. The p < 0.05 was considered as significant.

RESULTS: A total of 30 patients were included in the study. The average age of the participants was 59.3 (45–81) years. Minimum 1 and maximum 6 grafts (2.96 in average) were taken from all patients. Relaxation response was formed in the ITA at a rate of 40.49% ± 13.52, in the RA at a rate of 28.41% ± 9.08 and in the SV at a rate of 23.87% ± 8.36 by adding MS with the cumulative method. In the statistical work that was done by comparing the relaxation values among the SV grafts, ITA and RA grafts, it was determined that the efficacy of MS in the SV grafts was significantly lower when compared with the ITA and RA grafts.

CONCLUSIONS: In the present study, it was concluded that the risk of developing vasospasm was low in all three grafts when MS was used in intraoperative and postoperative periods. However, in the long-term, this made us consider that better graft patency rates might be obtained. Multicenter in-vivo studies with larger patient groups are needed to support our findings.

Get Citation

Keywords

graft surgery, hypertension management, metaproterenol sulfate

About this article
Title

Is using metaproterenol sulfate reliable in hypertension management during the coronary artery bypass graft surgery in terms of graft patency?

Journal

Disaster and Emergency Medicine Journal

Issue

Vol 6, No 1 (2021)

Article type

Research paper

Pages

41-47

Published online

2021-02-26

DOI

10.5603/DEMJ.a2021.0006

Bibliographic record

Disaster Emerg Med J 2021;6(1):41-47.

Keywords

graft surgery
hypertension management
metaproterenol sulfate

Authors

Mehmet Okan Donbaloğlu
Özcan Gür
Selami Gürkan
Eylem Kuday Kaykısız

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