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Valve therapies

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https://www.readbyqxmd.com/read/28723125/pharmacokinetics-on-a-chip-using-label-free-sers-technique-for-programmable-dual-drug-analysis
#1
Jiayuan Fei, Lei Wu, Yizhi Zhang, Shenfei Zong, Zhuyuan Wang, Yiping Cui
Synergistic effects of dual or multiple drugs have attracted great attention in medical fields, especially in cancer therapies. We provide a programmable microfluidic platform for pharmacokinetic detection of multiple drugs in multiple cells. The well-designed microfluidic platform includes two 2 × 3 microarrays of cell chambers, two gradient generators, and several pneumatic valves. Through the combined use of valves and gradient generators, each chamber can be controlled to infuse different kinds of living cells and drugs with specific concentrations as needed...
June 23, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28720119/calcified-amorphous-tumor-of-the-heart-with-mitral-annular-calcification-a-case-report
#2
Ryo Nakamaru, Hiroki Oe, Katsuomi Iwakura, Takafumi Masai, Kenshi Fujii
BACKGROUND: Calcified amorphous tumor of the heart is a rare, non-neoplastic cardiac mass characterized by nodular calcium in the background of amorphous degenerating fibrinous material. Clinical diagnosis of calcified amorphous tumor can be difficult, and current single imaging techniques do not specifically differentiate calcified amorphous tumor from other cardiac tumors such as calcified atrial myxoma, calcified thrombi, or vegetation. Complete surgical resection is the treatment of choice for both symptom improvement and prevention of embolization, as well as for pathological diagnosis...
July 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28713024/to-retrieve-or-not-to-retrieve-system-revisions-with-the-micra-transcatheter-pacemaker
#3
Eric Grubman, Philippe Ritter, Christopher R Ellis, Michael Giocondo, Ralph Augostini, Petr Neuzil, Bipin Ravindran, Anshul M Patel, Pamela Omdahl, Karen Pieper, Kurt Stromberg, J Harrison Hudnall, Dwight Reynolds
BACKGROUND: Early experience with leadless pacemakers has shown a low rate of complications. However, little is known about system revision in patients with these devices. OBJECTIVE: To describe the system revision experience with the Micra Transcatheter Pacing System (TPS). METHODS: Implanted patients from the Micra TPS and the Micra Continued Access study (N = 989) were analyzed and compared to 2667 patients with transvenous pacemakers (TVP)...
July 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28712168/justification-for-re-look-cystoscopy-after-posterior-urethral-valve-fulguration
#4
Gul Nawaz, Ijaz Hussain, Shujah Muhammad, Muhammad Imran Jamil, Asad Ur Rehman, Nadeem Iqbal, Saeed Akhter
BACKGROUND: Posterior urethral valve (PUV) is life-threatening congenital anomaly of the urinary tract that results in vesicoureteric reflux, recurrent UTI, voiding dysfunction and renal insufficiency if not treat timely. Endoscopic ablation of posterior urethral valves using cold knife or laser is the current gold standard therapy. Many urologists go for repeat cystoscopy to see residual valve or stricture while others repeat VCUG to measure the posterior to anterior urethral ratio for residual obstruction...
January 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28709667/routine-use-of-topical-bacitracin-to-prevent-sternal-wound-infections-after-cardiac-surgery
#5
Joshua L Chan, Andrada C Diaconescu, Keith A Horvath
BACKGROUND: The development of sternal wound infections remains a serious complication after cardiac surgery. A number of studies have assessed the use of topical antibiotics placed on the sternal edges. We evaluated the routine use of bacitracin ointment applied over the sternotomy skin incision as a prophylactic measure against sternal wound infections. METHODS: A retrospective review of all coronary artery bypass graft and valve surgery cases performed at a single institution between 2006 and 2015 was performed (n = 1,495)...
July 11, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28708196/assessment-of-mitral-apparatus-in-patients-with-acute-inferoposterior-myocardial-infarction-and-ischaemic-mitral-regurgitation-with-two-dimensional-echocardiography-from-anatomically-correct-imaging-planes
#6
Karolina Mėlinytė, Živile Valuckiene, Renaldas Jurkevičius
BACKGROUND: Ischaemic mitral regurgitation (IMR) is associated with adverse prognosis after myocardial infarction (MI) as a result of left ventricular remodelling and geometric deformation of the mitral apparatus (MA). AIM: The aim of this study was to assess MA from anatomically correct imaging planes in acute inferoposterior MI and IMR. METHODS: Ninety-three patients with no structural cardiac valve abnormalities and the first acute inferoposterior MI were prospectively enrolled into the study...
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28706872/surgical-management-of-tricuspid-stenosis
#7
REVIEW
Marisa Cevasco, Prem S Shekar
Tricuspid valve stenosis (TS) is rare, affecting less than 1% of patients in developed nations and approximately 3% of patients worldwide. Detection requires careful evaluation, as it is almost always associated with left-sided valve lesions that may obscure its significance. Primary TS is most frequently caused by rheumatic valvulitis. Other causes include carcinoid, radiation therapy, infective endocarditis, trauma from endomyocardial biopsy or pacemaker placement, or congenital abnormalities. Surgical management of TS is not commonly addressed in standard cardiac texts but is an important topic for the practicing surgeon...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28706868/tricuspid-valve-endocarditis
#8
Syed T Hussain, James Witten, Nabin K Shrestha, Eugene H Blackstone, Gösta B Pettersson
Right-sided infective endocarditis (RSIE) is less common than left-sided infective endocarditis (IE), encompassing only 5-10% of cases of IE. Ninety percent of RSIE involves the tricuspid valve (TV). Given the relatively small numbers of TVIE cases operated on at most institutions, the purpose of this review is to highlight and discuss the current understanding of IE involving the TV. RSIE and TVIE are strongly associated with intravenous drug use (IVDU), although pacemaker leads, defibrillator leads and vascular access for dialysis are also major risk factors...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28701528/blood-pressure-and-arterial-load-after-transcatheter-aortic-valve-replacement-for-aortic-stenosis
#9
Brian R Lindman, Catherine M Otto, Pamela S Douglas, Rebecca T Hahn, Sammy Elmariah, Neil J Weissman, William J Stewart, Girma M Ayele, Feifan Zhang, Alan Zajarias, Hersh S Maniar, Hasan Jilaihawi, Eugene Blackstone, Khaja M Chinnakondepalli, E Murat Tuzcu, Martin B Leon, Philippe Pibarot
BACKGROUND: After aortic valve replacement, left ventricular afterload is often characterized by the residual valve obstruction. Our objective was to determine whether higher systemic arterial afterload-as reflected in blood pressure, pulsatile and resistive load-is associated with adverse clinical outcomes after transcatheter aortic valve replacement (TAVR). METHODS AND RESULTS: Total, pulsatile, and resistive arterial load were measured in 2141 patients with severe aortic stenosis treated with TAVR in the PARTNER I trial (Placement of Aortic Transcatheter Valve) who had systolic blood pressure (SBP) and an echocardiogram obtained 30 days after TAVR...
July 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28700992/natural-history-of-fetal-lower-urinary-tract-obstruction-with-normal-amniotic-fluid-volume-at-initial-diagnosis
#10
Mark P Johnson, Enrico Danzer, Jamie Koh, William Polzin, Chris Harman, Richard O'Shaughnessy, Richard Brown, Michael V Zaretsky
OBJECTIVE: The aim of this study was to define the natural history of lower urinary tract obstruction (LUTO) with normal midgestational amniotic fluid volumes. MATERIALS AND METHODS: We performed a retrospective review of 32 consecutive patients with LUTO with normal midgestational amniotic fluid volume followed at 11 North American Fetal Therapy Network (NAFTNet) centers from August 2007 to May 2012. Normal amniotic fluid volume was defined as an amniotic fluid index (AFI) of ≥9 cm...
July 13, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28698421/-tricuspid-valve-repair-in-a-patient-with-isolated-tricuspid-valve-infective-endocarditis-with-pulmonary-embolism-report-of-a-case
#11
Hiroyuki Hara, Kenji Minakata, Kazuhisa Sakamoto, Yuki Kuroda, Toshio Harada, Taro Nakatsu, Tomohiro Nakata, Kyokun Uehara, Kazuhiro Yamasaki, Tadashi Ikeda
We report a case of 39-year-old man who developed tricuspid valve infective endocarditis with a complication of pulmonary embolism. He was transferred to our institution because of intermittent fever and enlargement of the vegetation of the tricuspid valve in spite of optimal antibiotics treatment. Computed tomography revealed pulmonary embolism, and transesophageal echocardiography showed a large and mobile vegetation (22×10 mm) on the tricuspid valve with moderate regurgitation. In addition, Streptococcus agalactiae was identified in blood cultures...
July 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28698418/-reconstruction-of-anterior-mitral-leaflet-using-fresh-autologous-pericardial-patch-for-active-infective-endocarditis-report-of-a-case
#12
Hideaki Kanda, Tamahiro Kinjo, Yosuke Hisashi
Several reports have described that the prognosis of patients with mitral valve regurgitation due to active infective endocarditis (IE) is better after mitral valve plasty (MVP) than replacement (MVR). However, extensive destruction of valve tissue might cause difficulties with MVP. We repaired a widely-affected anterior mitral leaflet (AML) using an autologous pericardial patch. A 44-year-old woman with mitral regurgitation presented with prolonged fever and backache. We made a diagnosis of active IE accompanied by mitral valve regurgitation...
July 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28698289/mechanism-and-implications-of-the-tricuspid-regurgitation-from-the-pathophysiology-to-the-current-and-future-therapeutic-options
#13
REVIEW
Antonio Mangieri, Claudio Montalto, Matteo Pagnesi, Richard J Jabbour, Josep Rodés-Cabau, Neil Moat, Antonio Colombo, Azeem Latib
The tricuspid valve was virtually ignored for a long time in the past. However, significant tricuspid regurgitation (TR) often accompanies left-side heart valve pathology and does not always reverse with its correction. If left untreated, TR can progress and result in progressive right ventricular failure. Current guideline recommendations still hold minor differences. Nevertheless, there is a consensus to operate on patients with severe TR undergoing left-sided valve surgery (class I) or those with mild to moderate TR with a dilated annulus (≥40 or ≥21 mm(2), Class IIa)...
July 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28697893/mechanical-valves-in-the-pulmonary-position-an-international-retrospective-analysis
#14
Hanna Pragt, Joost P van Melle, Hoda Javadikasgari, Dong Man Seo, John M Stulak, Igor Knez, Jürgen Hörer, Christian Muñoz-Guijosa, Mahyar G Dehaki, Hong Ju Shin, Joseph A Dearani, Maziar G Dehaki, Petronella G Pieper, Christine Eulenburg, Laura Dos, Tjark Ebels
OBJECTIVE: Life expectancy of patients with congenital heart disease has improved over the past decades, increasing the need for a durable pulmonary prosthetic valve. Biological valves in various forms have become the valve of choice for pulmonary valve replacement (PVR), but structural valve deterioration is unavoidable in the long term. Use of a mechanical valve could be an alternative, but data on long-term outcomes are sparse. METHODS: We retrospectively collected and analyzed data on 364 patients with mechanical valves implanted in the pulmonary position between 1965 and 2014...
May 20, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28691982/percutaneous-valve-in-valve-implantation-for-dysfunctional-bioprosthetic-valves-a-case-report
#15
Ting Hai, Yannis Amador, Jelliffe Jeganathan, Arash Khamooshian, Robina Matyal, Feroze Mahmood
Percutaneous valve-in-valve therapy is a life-saving procedure for patients at high risk of reoperation due to dysfunctional bioprosthetic valves. We have reviewed 3 typical cases of a valve-in-valve procedure using high-quality images to demonstrate the suitability of this method for aortic, mitral, and tricuspid positions. Three-dimensional transesophageal echocardiography combined with other modalities such as computerized tomography and fluoroscopy are key elements for anesthesia and procedural guidance, especially as immediate tools to assess valvular function and specific procedure-related complications...
July 6, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28691909/fracturing-mechanics-before-valve-in-valve-therapy-of-small-aortic-bioprosthetic-heart-valves
#16
Peter Johansen, Henrik Engholt, Mariann Tang, Rasmus F Nybo, Per D Rasmussen, Jens Erik Nielsen-Kudsk
AIMS: Patients with degraded bioprosthetic heart valves (BHV) who are not candidates for valve replacement may benefit from transcatheter valve-in-valve (VIV) therapy. However, at smaller sized surgical BHV the resultant orifice may become too narrow. To overcome this, the valve frame can be fractured by a high-pressure balloon prior to VIV. However, knowledge on fracture pressures and mechanics are prerequisites. The aim of this study is to identify the fracture pressures needed in BHV, and to describe the fracture mechanics...
July 11, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28690311/predictors-of-long-term-mortality-and-frequent-re-hospitalization-in-patients-with-acute-decompensated-heart-failure-and-kidney-dysfunction-treated-with-renin-angiotensin-system-blockers
#17
Canan Baydemir, Dilek Ural, Kurtuluş Karaüzüm, Sibel Balci, Onur Argan, Irem Karaüzüm, Güliz Kozdağ, Ayşen A Ağır
BACKGROUND Assessment of risk for all-cause mortality and re-hospitalization is an important task during discharge of acute heart failure (AHF) patients, as they warrant different management strategies. Treatment with optimal medical therapy may change predictors for these 2 end-points in AHF patients with renal dysfunction. The aim of this study was to evaluate the predictors for long-term outcome in AHF patients with kidney dysfunction who were discharged on optimal medical therapy. MATERIAL AND METHODS The study was conducted retrospectively...
July 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28689751/postprocedural-changes-of-tricuspid-regurgitation-after-mitraclip-therapy-for-mitral-regurgitation
#18
Kentaro Toyama, Kengo Ayabe, Saibal Kar, Shunsuke Kubo, Toshinori Minamishima, Florian Rader, Takahiro Shiota, Toshihiko Nishioka, Robert J Siegel
The effect of percutaneous mitral valve repair using the MitraClip system on tricuspid regurgitation (TR) has not been well investigated. We retrospectively analyzed 102 consecutive patients who underwent the successful MitraClip procedure, and who also had a preprocedural and 1-year follow-up transthoracic echocardiography. TR severity was graded by standard guideline-recommended criteria. At 1 year after the MitraClip procedure, the degree of TR regressed (at least 1 grade) in 23% of the patients, was unchanged in 62% of the patients, and progressed in 16% of the patients...
June 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28688832/prosthetic-valve-infective-endocarditis-with-mycobacterium-fortuitum-antibiotics-alone-can-be-curative
#19
Sonali R Gnanenthiran, Eunice Y T Liu, Michael Wilson, Tommy Chung, Thomas Gottlieb
Rapidly growing non-tuberculous mycobacteria (RGM) are a rare, often fatal cause of infective endocarditis. Although surgery has been the cornerstone of RGM endocarditis therapy, we present the first documented adult case of Mycobacterium fortuitum endocarditis cured with antibiotic therapy.
June 15, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28688022/mitral-valve-disease-a-comprehensive-review
#20
REVIEW
Serge C Harb, Brian P Griffin
PURPOSE OF REVIEW: This review aims to provide a comprehensive assessment of mitral valve disease, both mitral stenosis and mitral regurgitation, starting with an overview of the valve anatomy. RECENT FINDINGS: The advent of three-dimensional imaging has allowed a better representation of the valve anatomy. Rheumatic disease is still the number one cause of mitral stenosis worldwide and percutaneous balloon mitral valvuloplasty remains the therapy of choice when indicated and in anatomically eligible patients...
August 2017: Current Cardiology Reports
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