Peer-reviewed veterinary case report
How mitral valve closure improves blood flow in dog cardiac massage
By Goto, Ai et al.·Published in The Journal of veterinary medical science·2022·Department of Pharmacology, Japan·View original on PubMed →
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Original publication title: Magnitude of mitral valve closure plays a pivotal role in enhancing the forward blood flow during cardiac massage in dogs with ventricular fibrillation.
- Species:
- dog
Plain-English summary
Four beagle dogs in cardiac arrest due to ventricular fibrillation were studied to see how different types of chest compressions affected blood flow. The researchers found that a method called active compression-decompression cardiac massage (ACD-CM) was more effective than standard chest compressions at increasing blood flow to the heart. During ACD-CM, the mitral valve closed better, which helped push blood forward more effectively. This suggests that using ACD-CM could improve outcomes in dogs experiencing cardiac arrest.
People also search for: dog cardiac arrest treatment · beagle heart problems · chest compressions for dogs
Abstract
Motion of mitral valve during cardiac massage was examined using beagle dogs with ventricular fibrillation (n=4). Active compression-decompression cardiac massage (ACD-CM) exhibited greater peak aortic pressure than standard cardiac massage (S-CM), reverse of which was true for peak pulmonary capillary wedge pressure in each animal. Accordingly, peak aortic pressure was greater than peak pulmonary capillary wedge pressure with ACD-CM, whereas its reverse was true with S-CM. Transesophageal echocardiography revealed that mitral valve was incompletely closed with S-CM with showing regurgitation. The valve was more effectively closed during ACD-CM. These results indicate that effective closure of mitral valve during cardiac massage may increase forward blood flow, supporting "cardiac pump theory" rather than "thoracic pump theory" as a principle in dogs.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/35527014/