•Build a large-scale 3D shape retrieval benchmark that supports multi-modal queries.•Evaluate the 26 3D shape retrieval methods using 3 types of metrics.•Solicit and identify state-of-the-art methods ...and promising related techniques.•Perform detailed analysis on diverse methods w.r.t accuracy and efficiency.•Make benchmark and evaluation tools freely available to the community.
Large-scale 3D shape retrieval has become an important research direction in content-based 3D shape retrieval. To promote this research area, two Shape Retrieval Contest (SHREC) tracks on large scale comprehensive and sketch-based 3D model retrieval have been organized by us in 2014. Both tracks were based on a unified large-scale benchmark that supports multimodal queries (3D models and sketches). This benchmark contains 13680 sketches and 8987 3D models, divided into 171 distinct classes. It was compiled to be a superset of existing benchmarks and presents a new challenge to retrieval methods as it comprises generic models as well as domain-specific model types. Twelve and six distinct 3D shape retrieval methods have competed with each other in these two contests, respectively. To measure and compare the performance of the participating and other promising Query-by-Model or Query-by-Sketch 3D shape retrieval methods and to solicit state-of-the-art approaches, we perform a more comprehensive comparison of twenty-six (eighteen originally participating algorithms and eight additional state-of-the-art or new) retrieval methods by evaluating them on the common benchmark. The benchmark, results, and evaluation tools are publicly available at our websites (http://www.itl.nist.gov/iad/vug/sharp/contest/2014/Generic3D/, 2014, http://www.itl.nist.gov/iad/vug/sharp/contest/2014/SBR/, 2014).
The leading cause of death in chronic renal dialysis patients is cardiovascular disease. As the number of dialysis patients increases, we are encountering more patients with severe ischemic heart ...disease requiring coronary intervention.
A retrospective analysis was performed of the short- and long-term clinical results in 23 coronary artery bypass grafting patients and 20 coronary angioplasty patients undergoing chronic renal dialysis.
Among coronary bypass grafting patients, there were no hospital deaths. The graft patency rate was 100% for arterial grafts. There were four late deaths and four cardiac events. In coronary angioplasty patients, the lesion success rate was 76%. There were no hospital deaths and three major complications. The restenosis rate was 70%. There were two late deaths and 14 cardiac events. The 5-year cardiac event-free rate was 70% in coronary bypass grafting patients, significantly better than 18% in coronary angioplasty patients (
p < 0.001).
Coronary artery bypass grafting in chronic renal dialysis patients can be accomplished with a better short- and long-term outcome than coronary angioplasty, through an intensive perioperative dialysis program and extensive use of arterial grafts.
A 33-year-old-man had severe secondary pulmonary hypertension due to perivalvular leakage at the aortic and mitral positions after aortic and mitral valve replacement. Preoperative cardiac ...catheterization revealed pulmonary artery pressure of 105/45 mmHg and pulmonary vascular resistance of 929 dynes·s·cm
−5
To save the patient, we performed aortic and mitral valve re-replacement, and tricuspid annuloplasty. After surgery, selective pulmonary vasodilators, beraprost sodium, inhaled nitric oxide, and intravenous prostaglandin (PG) I
2
were administered because of persistent severe pulmonary hypertension. Cardiac catheterization on postoperative day 58 showed that the pulmonary artery pressure and pulmonary vascular resistance had decreased to 40/20 mmHg and 87.7 dynes·s·cm
−5
, respectively The simultaneous use of inhaled nitric oxide, intravenous PGI
2
, and oral beraprost sodium might be useful for treating postoperative persistent pulmonary hypertension.
Coronary ostial stenosis between an interposition graft and coronary artery is rare and fatal. A 46-year-old woman who had reconstruction of both coronary arteries using interposition grafts for type ...A acute dissecting aneurysm presented with acute chest pain. Emergent coronary artery bypass grafting was done with saphenous vein grafts. Inappropriate use of gelatin-resorcinol-formaldehyde glue can be associated with ostial stenosis in the long term. Transesophageal echocardiography is useful to diagnose ostial stenosis of the coronary arteries.
A 46-year-old female was admitted to our hospital complaining of dizziness. Echocardiography and magnetic resonance imaging showed a pedicled tumor in the right ventricular outflow tract (RVOT), ...causing severe obstruction during systole. Resection was performed under cardiopulmonary bypass. Postoperative course was uneventful, with complete disappearance of major symptoms. Histological examination revealed the nature of the tumor to be a benign hemangioma. As reports of cardiac hemangioma causing severe RVOT obstruction are extremely rare, this case warrants attention.
Right ventricular failure after left ventricular assist device implantation sometimes requires additional mechanical right ventricular support. The effectiveness of nitrates, prostaglandin, or nitric ...oxide inhalation in such cases has already been reported. However, there are few reports on the administration of phosphodiesterase inhibitor for right ventricular failure after left ventricular assist device implantation. We report two patients with right ventricular failure after left ventricular assist device implantation successfully treated with milrinone. Both had residual pulmonary hypertension due to high pulmonary vascular resistance after left ventricular assist device implantation. However, intravenous milrinone caused a significant reduction in pulmonary vascular resistance and an increase in left ventricular assist device flow. Milrinone acts as both an inotropic agent and a direct vasodilator, and thus may avoid the need for mechanical support for right ventricular failure due to residual pulmonary hypertension after left ventricular assist device implantation.
Surgical treatment of acute aortic dissection in a patient with idiopathic dilated cardiomyopathy is rare. A 57-year-old man diagnosed with idiopathic dilated cardiomyopathy with left ventricular ...dimension of 59 mm in diastole, left ventricular dimension of 47 mm in systole, and fractional shortening of 0.19 on echocardiography developed type A acute aortic dissection. Emergency surgery was conducted for ascending aorta and hemiarch repair for ascending aorta redissection and dilation. The postoperative course was uneventful under appropriate hemodynamic control. Standardized criteria for aortic dissection in a patient with poor left ventricular contraction have not established, but surgery should be considered for all patients in good preoperative condition when it is the only effective life-saving alternative.
