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Yamada S, Hirao D, Miura N, Iwanaga T, Kawaguchi T, Yoshimura A, Oomori T, Nagasato T, Maruyama I, Fukushima R. Comparison between blood coagulability in the intra-atrial and peripheral regions during the acute phase after rapid atrial pacing. Exp Anim 2019; 68:137-146. [PMID: 30381652 PMCID: PMC6511516 DOI: 10.1538/expanim.18-0100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 10/01/2018] [Indexed: 12/21/2022] Open
Abstract
The changes in intra-atrial blood coagulability of acute phase after development of atrial fibrillation (AF) have not been elucidated in human. In the present study, blood coagulability were examined in the intra-atrial and peripheral regions during the acute phase after development of rapid atrial pacing (RAP) in experimentally created model dog similar to AF, using Total Thrombus-formation Analysis System (T-TAS) that is capable of comprehensively evaluating thrombogenicity in the bloodstream in the microvascular channel. According to the results, both the coagulating function-evaluating time to +10 kPa (T10) and occlusion time (OT) of the AR chip (chip for thrombus analysis mixed with coagulation and platelet) were significantly shortened in the atrial blood as early as 30 min after pacing (T10, 150.5 ± 40.5 s; OT, 212.4 ± 44.3 s) compared to the pre-pacing levels (T10, 194.5 ± 47.5 s; OT, 259.9 ± 49.5 s) (P<0.05). The OT of PL chip (chip for platelet thrombus analysis) was significantly shortened 30 min after pacing (231.8 ± 57.6 s), compared to the pre-pacing level (289.5 ± 96.0 s) (P<0.05). Meanwhile, none of T10 and OT of AR and PL chips showed any significant changes in the peripheral blood. The study demonstrated increase of blood coagulability 30 min after development of RAP. While no significant changes were observed in the peripheral blood in the present study, the outcome suggested that the anti-thrombus treatments are better to be started early after AF even if coagulability of the peripheral blood shows no change.
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Affiliation(s)
- Shusaku Yamada
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
| | - Daiki Hirao
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
| | - Naoki Miura
- Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Koorimoto, Kagoshima 890-0065, Japan
| | - Tomoko Iwanaga
- Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Koorimoto, Kagoshima 890-0065, Japan
| | - Takae Kawaguchi
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
| | - Aritada Yoshimura
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
| | - Takahiro Oomori
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
| | - Tomoka Nagasato
- Department of System Biology in Thromboregulation, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Ikuro Maruyama
- Department of System Biology in Thromboregulation, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Ryuji Fukushima
- Animal Medical Center, Tokyo University of Agriculture and Technology, 3-5-8 Sawai-cho, Fuchushi, Tokyo 183-8509, Japan
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