Abstract Background Device-based fully automatic pacing capture detection is useful in clinical practice and important in the era of remote care management. The main objective of this study was to ...verify the effectiveness of the new ACAP Confirm® algorithm in managing atrial capture in the medium term in comparison with early post-implantation testing. Methods Data were collected from 318 patients (66% male; mean age, 73±10 years); 237 of these patients underwent device implantation and 81 box changes in 31 Italian hospitals. Atrial threshold measurements were taken manually and automatically at different pulse widths before discharge and during follow-up (7±2 months) examination. Results The algorithm worked as expected in 73% of cases, considering all performed tests. The success rate was 65% and 88% pre-discharge and during follow-up examination ( p <0.001), respectively, in patients who had undergone implantation. We did not detect any difference in the performance of the algorithm as a result of the type of atrial lead used. The success rate was 70% during pre-discharge testing in patients undergoing device replacement. Considering all examination types, manual and automatic measurements yielded threshold values of 1.07±0.47 V and 1.03±0.47 V at 0.2-ms pulse duration ( p =0.37); 0.66±0.37 V and 0.67±0.36 V at 0.4 ms ( p =0.42); and 0.5±0.28 V and 0.5±0.29 V at 1 ms ( p =0.32). Conclusions The results show that the algorithm works before discharge, and its reliability increases over the medium term. The algorithm also proved accurate in detecting the atrial threshold automatically. The possibility of activating it does not seem to be influenced by the lead type used, but by the time from implantation.
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FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, UILJ, UL, UM, UPCLJ, UPUK, VSZLJ, ZAGLJ, ZRSKP
With the availability of a wide variety of valve prostheses, surgeons are still searching for the ideal valve, striving for improved hemodynamics, durability and thrombogenicity.
The purpose of this ...prospective, randomized, comparative study was to evaluate the early post-operative hemodynamic function and major clinical events in patients receiving CardiaMed™ prosthetic valves in comparison to St. Jude Medical™ (SJM) valves in the mitral valve position.
Between Sept 2013 and Sept 2015, 60 elective mitral valve replacement (MVR) patients in Ain Shams Hospital, Cairo, Egypt were divided into two groups of 30. Group I received the CardiaMed valve and Group II received the SJM valve. All patients were followed up at discharge from hospital, and at three and six months post-operatively.
There were no statistical differences between groups regarding the demographic data, preoperative clinical and functional NYHA class, cardiac assessment or mitral valve pathology. By the end of the follow up, there was no valve-related co-morbidity. Early post-operative complications were seen in 4 patients (13.3%) in Group I and in 5 patients in Group II (16.7%), namely; re-exploration for bleeding, rhythm disturbance, or wound infection. The PPG and MPG were slightly higher in Group I (10.9 ± 1.2 and 5.3 ± 0.9) than in Group II (10.2 ± 2.3 and 5.2 ± 1.3); p = 0.798 and 0.107 respectively. There was no significant statistical difference between the groups regarding the post-operative echo follow-up data.
CardiaMed freely floating leaflet prostheses showed good hemodynamic characteristics. The prosthesis adequately corrects hemodynamics and is safe and no worse than the St. Jude Medical valve in the mitral valve position.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Generating three-dimensional models from real world objects based on images from a single camera is an important application in computer vision and numerous possible applications. For this ...Structure-from-Motion (SfM) algorithms provide an approach based on the successful tracking of 2D feature points throughout an image sequence and the subsequent camera egomotion estimation and a global 3D structure recovery. However, the performance of those approaches is still limited according their precision, denseness and completeness of the reconstructed scene model. This paper introduces an approach based on Inventive Design Methodology (IDM) for the systematic analysis of existing SfM approaches and a subsequent derivation of a novel sensor fusion approach in order to overcome current application-related restrictions.
The world-wide growing competition for talented applicant to universities and digital transformation of the world forces public relation departments of education institutions to develop effective ...communication strategies, tactics and tools. Digitalization of communication helps to collect and analyze data from students on different "stages": when they are applicants, students, or alumni.The article introduces a Student Journey Map (SJM) as a tool for effective university communication strategy development in digital environment as far as it is learners' experience oriented.
Relative intensities of singly-charged mono-bromide silver clusters AgxBr+ formed from sputtering of a pressed pellet of silver bromide were measured by mass spectrometry. The obtained results ...suggest that the AgxBr+ clusters have a structural formula of the form Agx–1+(AgBr). The relative stability of Agx–1+(AgBr) was determined by the intrinsic stability of the remaining metallic portion of the cluster (Agx–1+) as predicted by the spherical jellium model (SJM). Unimolecular and high-energy collision-induced dissociation (CID) spectra of AgxBr+ (x = 2, 4, 6, 8, 10) clusters were also measured. In all of the spectra, the most intense fragment peaks were assigned to the Agx–1+ ions accompanying the loss of AgBr. The difference in the relative intensities of the Agx–1+ peaks between unimolecular dissociation and CID spectra led us to conclude that the weakest bond in the excited cluster AgxBr+* is the Agx–1+–AgBr bond and the structure of AgxBr+ is a metallic Agx–1+ ion cluster adduct with AgBr. The primary fragments observed in the CID spectra were also explained by the stabilities of the generated ion products and neutral fragments, both having even delocalized valence electrons. The present results were consistently explained by SJM. The dissociation behavior of Ag2Br+ can be explained on the basis of the calculated thermochemical data.
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NUK, OILJ, SAZU, UKNU, UL, UM, UPUK
The authors are working toward practical use of a deterioration diagnosis technique for marine structures based on images shot from a small unmanned boat. This paper reports the effect of the ...luminance and resolution of images shot from the water surface on the results of deterioration diagnosis of the undersurface of a concrete pier superstructure. Using images with a minimum pixel width of 1-2 mm, a crack width of 1 mm can be detected provided the mean luminance of an image is around 50 to 150. The errors of damage area measurement were around 5%. When the minimum pixel width is 2-4 mm or less, a crack width of 1 mm can be calculated. As to measurement of damage areas, the errors were found to be around 5% when the minimum pixel width of images were 16 mm or less.
Carpentier Edwards pericardial valve 19mm(A群)および21mm(B群)を使用した高齢者・狭小大動脈弁輪症例の術後血行動態をSt. Jude Medical hemodynamic plus ...19mm(C群)を用いた症例と比較・検討した.A群10例,B群5例,C群13例を対象とし,人工弁の機能評価として心臓超音波検査を用い,左室-大動脈間最大圧較差を計測した.また追加検査が可能であったA群5例,B群4例,C群4例にドブタミン負荷試験を行い,その前後での最大圧較差を計測した.最大圧較差は,術前ではA群で80±18.5mmHg,B群で81.6±17.5mmHg,C群で87±36.3mmHgであった.術後いずれも改善したが,A群で24.2±7.3mmHg,B群で14.2±6.2mmHg,C群で26.7±19.0mmHgで統計学的有意差は認めなかった.ドブタミン負荷試験における負荷量はA群で8.2±1.6μg/kg/min,B群で7.2±2.0μg/kg/min,C群で7.7±1.5μg/kg/minであった.最大圧較差は,負荷前ではA群で18.1±4.3mmHg,B群で14.2±6.2mmHg,C群で20.9±5.7mmHgであり,負荷によりいずれも圧較差は増大したが,A群で41.1±15.0mmHg,B群で32.2±9.8mmHg,C群で46.8±14.4mmHgで統計学的有意差は認めなかった.CEP19mm,21mmの血行動態はHP19mmと比較しても満足できるものであり,CEP19mm,21mmは高齢者・狭小大動脈弁輪症例に有用であった.
In previous studies 1,2, the impact of valve orientation on the hemodynamic performance of mechanical aortic valves has been demonstrated. This study investigates Turbulence (RNS values) and High ...Intensity Transient Signals (HITS) as a new and objective parameter for hemodynamics in different orientations of Medtronic Hall (MH) and St. Jude Medical (SJM) aortic valves.
A rotation device carrying MH or SJM valves was implanted in 4 pigs. The device allowed valve rotation without reopening the aorta. In different orientations, turbulent shear stresses (RNS values) and HITS were measured.
RNS and HITS changed for both valve designs in various orientations, with superior results for the MH in the hemodynamically best orientation. Downstream turbulence (RNS) and HITS varied into the same direction, but a one-to-one correlation was not observed.
RNS and HITS vary with respect to valve orientation and design with superior results for the tilting disc valve. Both MH and SJM valves showed lower turbulence and HITS counts in their hemodynamically best orientations. HITS were related to downstream turbulence and the hemodynamic performance of the mechanical aortic valves.
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