Complete sequence of a cholangiocarcinoma inbred Sprague-Dawley rat model mitochondrial genome.

In the present work we undertook the complete mitochondrial genome sequencing of an important cholangiocarcinoma model inbred rat strain for the first time. Its mitogenome was 16,312 bp and coding 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes. A total of 96 SNPs were examined when compared to reference BN sequence.

Adenosine sensitivity is associated with ablation success rate and recurrence rate with nonirrigated catheters in patients with ventricular premature contractions/tachycardia from the ventricular outflow tract.

BACKGROUND: A high ablation success rate for ventricular arrhythmia (VA) from outflow tract has been achieved, but some of them cannot be eliminated from endocardium. We investigated the association between adenosine sensitivity and ablation success/recurrence rates with a nonirrigated or an irrigated catheter. METHODS: According to adenosine test, all patients were divided into a sensitive group (S group) or an insensitive group (I group). The patients of each group were randomized into a nonirrigated catheter (NA) subgroup or an irrigated catheter (IA) subgroup with a 2:1 ratio. RESULTS: In S group of 122 patients (84 in NA subgroup), the ablation success rate was similar between two subgroups (94.7% vs. 90.5%, P > 0.05), but in I group of 94 patients (60 in NA subgroup), it was higher in IA subgroup (94.1%) than that in NA subgroup (73.3%, P < 0.05). The success rate using nonirrigated catheter was significantly higher in S group (90.5%) than that in I group (73.3%, P < 0.01), and the recurrence rate was lower in S group than that in I group (1.3%, vs. 13.6%, P < 0.05). On the contrary, the success rate and the recurrence rate using irrigated catheter were similar between S group and I group (94.7%, 94.1%, P > 0.05, vs. 2.8%, 6.3%, P > 0.05). CONCLUSIONS: Adenosine insensitivity is associated with a lower success rate and a higher recurrence rate for VA patients undergoing nonirrigated catheter ablation. Thus, irrigated catheters should be the first choice for VA ablation in adenosine insensitive patients.

Cardiac magnetic resonance imaging of eosinophilic endomyocardial disease.

Idiopathic hypereosinophilic syndrome (HES) is rare and frequently involves the heart with development of endomyocardial fibrosis, a characteristic restrictive cardiomyopathy. Non-invasive diagnosis is frequently challenging. Recent developments in cardiac magnetic resonance (CMR) imaging techniques offer potential for improved detection and characterization of this entity. We describe the use of contrast-enhanced CMR to demonstrate thrombus, endomyocardial fibrosis and inflammation in eosinophilic endomyocardial disease. A three-layered appearance consisting of normal myocardium, thickened fibrotic endocardium with inflammatory exudate, and overlying thrombus was seen on cine-images. Post-contrast perfusion and delayed enhancement images confirmed the presence and location of endomyocardial fibrosis and thrombus. CMR is an important and powerful addition to current non-invasive diagnostic tools for the clinical diagnosis of eosinophilic endomyocardial disease, and may potentially obviate the need for cardiac biopsy in the future.