CTO-PCI performed by highly experienced specialists achieved a high technical success rate.

Wider application of retrograde CTO PCI achieved a high rate of success in recanalisation with an acceptable rate of complications in Japan.

No abstract

ABSTRACT. An anomalous shunt between the bronchoesophageal artery and pulmonary artery was diagnosed in a 1-year-old, 3.5 kg female Miniature Dachshund by selective contrast angiography. A cardiac murmur had been observed in the dog during examination at another hospital. The machinery murmur was auscultated at the left side of the base of the heart. Although thoracic radiography revealed mild cardiomegaly, the characteristic findings of patent ductus arteriosus (PDA), including as aortic arch enlargement and pulmonary artery enlargement were not observed. Echocardiography demonstrated shunting of blood flow presumably from the arterial duct at the pulmonary artery carina. Based on the above findings the case was diagnosed as PDA. Angiocardiography was performed to confirm the diagnosis in preparation for surgical treatment, but later we confirmed that the shunt vessel was not PDA, but apparently a branch of the bronchoesophageal artery. The shunt vessel was branching in a complicated manner and shunted to the pulmonary artery. KEY WORDS: bronchoesophageal artery, canine, PDA.J. Vet. Med. Sci. 63 (7): [819][820][821][822] 2001 Anomalies of the blood vessels of the heart have been reported in dogs. These anomalies include patent ductus arteriosus (PDA), vascular ring anomalies and anomalies of the aorta [5]. Among these, PDA is the most common congenital cardiovascular abnormality in dogs [5,7]. PDA can be diagnosed by demonstrating several characteristics, including machinery murmur, heard best over the left cranial thorax, left atrial enlargement, dilation of the aortic arch and main pulmonary artery on radiography and shunt blood flow inside the pulmonary artery on echocardiography [2,7]. But anomalies of the blood vessels that resembled on inspection view of PDA have been reported in a dog [12]. In that case, the shunt existed between the bronchoesophageal artery and the pulmonary artery. It is difficult to diagnose with noninvasion examinations, because it is similar to PDA in terms of hemodynamics. Such a case is very rare but differential diagnosis by cardiac catheterization is required prior to surgical correction.The present case was diagnosed as PDA on noninvasion examinations, but on cardiac catheterization the aberrant vessels were demonstrated thought to be a branch of the bronchoesophageal artery connected to the main pulmonary artery.A 12-month old, 3.5 kg female Miniature Dachshund was presented for evaluation of cardiac murmur. The dog was referred to the Azabu University Veterinary Teaching Hospital for further examination and treatment.Physical and biochemical examinations yielded normal findings, except a grade III/VI machinery murmur heard on the left side of the base of the heart. Electrocardiography revealed the presence of P pulmonale (Fig. 1). Phonocardiography showed a continuous murmur heard loudest at the time of the second heart sound (Fig. 2). Thoracic radiographs demonstrated mild cardiomegaly (vertebral heart size=VHS: 10.6v, cardiothoracic ratio=CTR: 73.3%) (Fig. 3). Two-dimen...

Aims: Guidewire (GW) tracking in a collateral channel (CC) is an important step during retrograde chronic total occlusion (CTO) percutaneous coronary intervention (PCI). The aim of this study was to create a prediction score model for CC GW crossing success. Methods and results:We analysed data on 886 CCs included in the Japanese CTO PCI Expert Registry during 2016. CCs were categorised as septal (n=610) and non-septal (n=276). CCs were randomly assigned to derivation and validation sets in a 2:1 ratio. The score was developed by multivariate analysis with angiographic findings. Small vessel, reverse bend, and continuous bends were independent predictors in the septal CC subset. Small vessel, reverse bend, and corkscrew were independent predictors in the non-septal CC subset. The extent of intervention was easy, intermediate, and difficult in 92.9%, 57.4%, and 16.7% in the septal CC subset and 91.7%, 54.3%, and 19.0% in the non-septal CC subset, respectively, in the validation set. The area under the receiver operating characteristic curve was >0.7 in the derivation and validation sets of both CC subsets. Conclusions:The prediction score model can suggest grading of the difficulty of CC GW crossing based on angiographic findings for each type of CC.