keyword
MENU ▼
Read by QxMD icon Read
search

mitral annulus

keyword
https://www.readbyqxmd.com/read/29349803/assessment-of-mitral-annulus-and-mitral-leaflet-in-nonvalvular-atrial-fibrillation-patients-with-various-degrees-of-mitral-regurgitation-real-time-3d-transesophageal-echocardiography
#1
Yongjuan Luo, Yanbo Zhu, Xin Guan, Yunjia Lin
AIM: To study the changes of mitral valve (MV) in patients with nonvalvular atrial fibrillation (NVAF)-related mitral regurgitation (MR) and the relationship between MV parameters and the enlarged left atrium (LA). MATERIALS AND METHODS: A total of 43 patients with NVAF were divided into two groups: (1) the MR1 group with mild MR and (2) the MR2 group with moderate-to-severe MR. Real time 3D transesophageal echocardiography (TEE) was performed to detect the structure of MV...
January 19, 2018: Echocardiography
https://www.readbyqxmd.com/read/29346710/an-extensive-caseous-calcification-of-the-mitral-annulus-complicated-with-severe-mitral-regurgitation
#2
Alper Karakus, Hakan Tibilli, Ibrahim H Inanc, Hakan Tasolar, Serdar Turkmen, Erdal Akturk
Caseous calcification of the mitral annulus (CCMA) is considered a rare variant of mitral annular calcification (MAC) due to caseous transformation of the inner material and prevalence of CCMA, about 0.63% of all MAC cases and 0.06%-0.07% of the population. The precise pathophysiology of CCMA is still unknown. It is a chronic degenerative disorder common in the elderly, particularly in women. Caseous calcification of the mitral annulus (CCMA) is a soft peri-annular extensive calcification, resembling cardiac tumors, abscesses, vegetation, or calcified thrombus, which is composed of an admixture of calcium, fatty acids, and cholesterol with a toothpaste-like texture...
January 18, 2018: Echocardiography
https://www.readbyqxmd.com/read/29344797/annular-dynamics-of-memo3d-annuloplasty-ring-evaluated-by-3d-transesophageal-echocardiography
#3
Hiroyuki Nishi, Koichi Toda, Shigeru Miyagawa, Yasushi Yoshikawa, Satsuki Fukushima, Daisuke Yoshioka, Yoshiki Sawa
BACKGROUND: We assessed the mitral annular motion after mitral valve repair with the Sorin Memo 3D® (Sorin Group Italia S.r.L., Saluggia, Italy), which is a unique complete semirigid annuloplasty ring intended to restore the systolic profile of the mitral annulus while adapting to the physiologic dynamism of the annulus, using transesophageal real-time three-dimensional echocardiography. METHODS: 17 patients (12 male; mean age 60.4 ± 14.9 years) who underwent mitral annuloplasty using the Memo 3D ring were investigated...
January 17, 2018: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29332915/calcified-amorphous-tumor-induced-acute-cerebral-infarction
#4
Yoshihiro Aizawa, Toshiko Nakai, Yuki Saito, Koyuru Monno, Tomoyuki Morikawa, Rikitake Kogawa, Takumi Hatta, Takehiro Tamaki, Mahoto Kato, Munehito Arimoto, Shunji Osaka, Keishin Sunagawa, Xiao Yan Tang, Masashi Tanaka, Hiroyuki Hao, Atsushi Hirayama
We report the case of a 38-year-old woman who was admitted for acute cerebral infarction linked to a cardiac calcified amorphous tumor (CAT) and related mitral annular calcification (MAC). The cardiac mass was removed, and mitral valve replacement surgery was performed. Pathological examination revealed an amorphous accumulation of degenerating material within both lesions, indicating that build-up of calcium along the mitral annulus and subsequent rupture of the fibrotic tissue may be involved in the initiation and progression of CAT...
January 15, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29330651/3d-computed-tomography-to-compare-the-dimensions-of-the-left-atrial-appendage-in-patients-with-normal-sinus-rhythm-and-those-with-paroxysmal-atrial-fibrillation
#5
Maiko Hozawa, Yoshihiro Morino, Yuki Matsumoto, Ryoichi Tanaka, Kyohei Nagata, Akiko Kumagai, Atsushi Tashiro, Akio Doi, Kunihiro Yoshioka
Although paroxysmal atrial fibrillation (PAF) is an important cause of cardioembolic stroke, in contrast to chronic AF patients, the anatomical features of the left atrial appendage (LAA) in PAF patients remain unknown. Here, we investigated differences in LAA structures in patients with PAF and those with normal sinus rhythms (NSR) using 3D-computed tomography (3D-CT), which allows us to visualize complicated LAA structures at high spatial resolution. Study subjects were 30 consecutive PAF and 30 NSR patients with complete enhanced cardiac 3D-CT images available...
January 12, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29325812/transcatheter-mitral-valve-replacement-in-mitral-annulus-calcification-the-art-of-computer-simulation
#6
Júlia Karády, Ioannis Ntalas, Bernard Prendergast, Christopher Blauth, Steven Niederer, Pál Maurovich-Horvat, Ronak Rajani
There is considerable interest in transcatheter prosthetic valve treatment for mitral valve disease in high-risk individuals. Although the presence of mitral annular calcium (MAC) may provide an anchoring zone for such devices, results to date have been modest with reported technical failure rates approaching 30% in specialist centers. This in part relates to the risk of left ventricular outflow tract obstruction and device dislodgment but also to the lack of specific imaging guidelines to plan for such procedures...
January 4, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29321211/pathophysiology-of-degenerative-mitral-regurgitation-new-3-dimensional-imaging-insights
#7
Clemence Antoine, Francesca Mantovani, Giovanni Benfari, Sunil V Mankad, Joseph F Maalouf, Hector I Michelena, Maurice Enriquez-Sarano
Despite its high prevalence, little is known about mechanisms of mitral regurgitation in degenerative mitral valve disease apart from the leaflet prolapse itself. Mitral valve is a complex structure, including mitral annulus, mitral leaflets, papillary muscles, chords, and left ventricular walls. All these structures are involved in physiological and pathological functioning of this valvuloventricular complex but up to now were difficult to analyze because of inherent limitations of 2-dimensional imaging. The advent of 3-dimensional echocardiography, computed tomography, and cardiac magnetic resonance imaging overcoming these limitations provides new insights into mechanistic analysis of degenerative mitral regurgitation...
January 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29318795/isoflurane-s-effect-on-intraoperative-systolic-left-ventricular-performance-in-cardiac-valve-surgery-patients
#8
Ju Deok Kim, Ilsoon Son, Won Kyoung Kwon, Tae Yun Sung, Hanafi Sidik, Karam Kim, Hyun Kang, Jiyon Bang, Gwi Eun Yeo, Dong Kyu Lee, Tae Yop Kim
BACKGROUND: Isoflurane, a common anesthetic for cardiac surgery, reduced myocardial contractility in many experimental studies, few studies have determined isoflurane's direct impact on the left ventricular (LV) contractile function during cardiac surgery. We determined whether isoflurane dose-dependently reduces the peak systolic velocity of the lateral mitral annulus in tissue Doppler imaging (S') in patients undergoing cardiac surgery. METHODS: During isoflurane-supplemented remifentanil-based anesthesia for patients undergoing cardiac surgery with preoperative LV ejection fraction greater than 50% (n = 20), we analyzed the changes of S' at each isoflurane dose increment (1...
January 22, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29316158/reduced-stroke-distance-of-the-left-ventricular-outflow-tract-is-independently-associated-with-long-term-mortality-in%C3%A2-patients-hospitalized-due-to-heart-failure
#9
You Zhong, Qays Almodares, JieFu Yang, Fang Wang, Michael Fu, Magnus C Johansson
PURPOSE: Reduced blood circulation is an important feature of heart failure, and Doppler stroke distance of the left ventricular outflow tract is a measure of forward stroke volume. Several echocardiographic parameters have known prognostic implications in heart failure, but the prognostic implications of stroke distance in relation to other parameters are insufficiently known. The aim was therefore to test the hypothesis that stroke distance is associated with five-year all-cause mortality, independently of other echocardiography variables, and that stroke distance has added long-term prognostic value...
January 9, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29311562/imaging-4d-morphology-and-dynamics-of-mitral-annulus-in-humans-using-cardiac-cine-mr-feature-tracking
#10
Shuang Leng, Shuo Zhang, Meng Jiang, Xiaodan Zhao, Rui Wu, John Allen, Ben He, Ru San Tan, Liang Zhong
Feature tracking in cine cardiac magnetic resonance (CMR) is a quantitative technique to assess heart structure and function. We investigated 4-dimensional (4D) dynamics and morphology of the mitral annulus (MA) using a novel tracking system based on radially rotational long-axis cine CMR series. A total of 30 normal controls and patients with mitral regurgitation were enrolled. The spatiotemporal changes of the MA were characterized by an in-house developed program. Dynamic and morphological parameters extracted from all 18 radial slices were used as references and were compared with those from subsequently generated sub-datasets with different degrees of sparsity...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29310958/increased-left-ventricular-filling-pressure-and-arterial-occlusion-in-stroke-related-to-atrial-fibrillation
#11
Wi-Sun Ryu, Eun-Kee Bae, Soo-Hyun Park, Sang-Wuk Jeong, Dawid Schellingerhout, Matthias Nahrendorf, Dong-Eog Kim
BACKGROUND: We investigated whether left ventricular filling pressure is associated with arterial occlusion in patients with ischemic stroke related to atrial fibrillation (AF). METHODS: Ninety-nine patients with AF-related stroke were included. Left ventricular filling pressure was assessed by E (early mitral inflow velocity)/e' (early diastolic velocity of the mitral valve annulus velocity) ratio based on tissue Doppler echocardiography. Arterial occlusion was evaluated by computed tomography or magnetic resonance angiography...
January 5, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29305613/optimized-time-resolved-echo-piv-ptv-measurements-elucidate-blood-flow-in-patients-with-left-ventricular-thrombus
#12
Kaushik Sampath, Thura T Harfi, Ricard/T George, Joseph Katz
Contrast ultrasound is a widely used clinical tool to obtain real-time qualitative blood flow assessments in the heart, liver, etc. Echocardiographic particle image velocimetry (echo-PIV) is a technique for obtaining quantitative velocity maps from contrast ultrasound images. However, unlike optical PIV, routine echo images are prone to non-uniform spatiotemporal variations in tracer distribution, making analysis difficult for standard PIV algorithms. This study introduces optimized procedures that integrate image enhancement, PIV and particle tracking velocimetry (PTV) to obtain reliable time-resolved 2D velocity distributions...
January 5, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29296066/multimodality-imaging-assessment-of-a-caseous-calcification-of-the-mitral-valve-annulus
#13
Imen Hamdi, Chadia Chourabi, Younes Arous, Mehdi Ghommidh, Khalil Houissa, Abdeddayem Haggui, Nadhem Hajlaoui, Dhaker Lahidheb, Nejmeddine Ben Abdallah, Wafa Fehri, Habib Haouala
Caseous calcification of the mitral annulus (CCMA) is a rare echocardiographic finding. It is commonly misdiagnosed as an abscess, tumor or infective vegetation on the mitral valve. Since it is a benign process, differentiating it from malignant intra-cardiac mass is primordial to avoid unnecessary surgery. Various imaging modalities can be complimentary for definitive diagnosis. We present a case of CCMA in a 71-year-old female patient. Her medical history revealed hypertension, diabetes mellitus, hyperlipidaemia and coronary artery disease...
January 2018: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/29288892/rare-case-of-infective-endocarditis-involving-mitral-annular-calcification-leading-to-hemopericardium-and-sudden-cardiac-death-a-case-report
#14
Shauna Wentzell, Vidhya Nair
We present a unique case of a 76-year-old female who had sudden cardiac death due to hemopericardium. Post mortem examination revealed infective endocarditis(IE) superimposing on mitral annulus calcification(MAC) leading to abscess formation, epicardial fistulation and hemopericardium. MAC is currently considered a relatively benign condition of the elderly [1], however evidence suggests there are severe consequences when these patients develop IE. With an aging population, this is likely to be a more frequent occurrence and should be considered in patients who present with bacteremia of unknown origin...
December 5, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/29274313/mitral-ring-extraction-due-to-nickel-allergy
#15
Carlos Dominguez-Massa, Ana M Bel-Minguez, Manuel Perez-Guillen, Alberto Berbel-Bonillo, Fernando Hornero-Sos
The incidence of allergic reactions due to mechanical prosthesis or rings is not well established. We report the case of a 56-year-old male patient who presented a persistent urticarial rash and anaphylactic shock after mitral valve repair surgery. Prick skin tests were positive for nickel. After removing the nucleus from the mitral annulus, the urticarial clinic disappeared.
December 20, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29258732/using-a-regent-aortic-valve-in-a-small-annulus-mitral-position-is-a-viable-option
#16
Yaron D Barac, Brittany Zwischenberger, Jacob N Schroder, Mani A Daneshmand, Jack Haney, Jeff Gaca, Andrew Wang, Carmelo A Milano, Donald D Glower
BACKGROUND: Outcome of mitral valve replacement in extreme scenarios of small mitral annulus using the Regent mechanical aortic valve is not well documented. METHODS: Records were examined in 31 consecutive patients undergoing mitral valve replacement using the aortic Regent valve due to a small mitral annulus. RESULTS: Mean age was 60±14 years. Mitral stenosis or mitral annulus calcification was present in 30/31(97%) patients. Concurrent procedures were performed in 17/31(55%) patients...
December 16, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29248661/mitral-valve-adaptation-to-isolated-annular-dilation-insights-into-the-mechanism-of-atrial-functional-mitral%C3%A2-regurgitation
#17
Dae-Hee Kim, Ran Heo, Mark D Handschumacher, Sahmin Lee, Yun-Sil Choi, Kyu-Ri Kim, Yewon Shin, Hong-Kyung Park, Joyce Bischoff, Elena Aikawa, Jong-Min Song, Duk-Hyun Kang, Robert A Levine, Jae-Kwan Song
OBJECTIVES: This study hypothesized that compensatory mitral leaflet area (MLA) adaptation occurs in patients with persistent atrial fibrillation (AF) without left ventricular (LV) dysfunction but has limitations that augment mitral regurgitation (MR). The study also explored whether asymmetrical annular dilation is matched by relative leaflet enlargement. BACKGROUND: Functional MR occurs in patients with AF and isolated annular dilation, but the relationship of MLA adaptation with annular area (AA) is unknown...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29247615/how-to-adjust-neo-chordae-length-accurately-in-degenerative-mitral-regurgitation
#18
Jorge Rodriguez-Roda, Javier Miguelena, Jose Lopez, Miren Martin, Rafael Muñoz
We describe a simple technique for the accurate adjustment of polytetrafluoroethylene neo-chordae length in degenerative mitral regurgitation using the annuloplasty ring own suture as reference, instead of using sophisticated or less precise maneuvers. Two threats of the annuloplasty ring suture are placed at the level of the mitral valve annulus plane to be used as a reference to tie the neo-chordae.
December 13, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29244156/percutaneous-increase-of-mitral-leaflet-coaptation-length-after-mitral-valve-repair-results-from-a-preclinical-study
#19
Piergiorgio Tozzi, Giuseppe Siniscalchi, Enrico Ferrari, Matthias Kirsch, Daniel Hayoz
OBJECTIVES: The failure of mitral repairs can be the result of inadequate leaflet coaptation length (CL< 8 mm at the A2-P2 level). A new annuloplasty ring conceived by the authors enables post-surgical CL increase using percutaneous balloon catheter technology. We conducted preclinical studies to assess the in vivo feasibility of the procedure and the safety of the postimplant deformable mitral ring. METHODS: The new annuloplasty ring allows the percutaneous and progressive displacement of each of the 3 anatomical regions of the posterior mitral annulus towards the anterior...
December 13, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29238893/postprandial-cardiogenic-syncope-caused-by-gastric-polyp-induced-pyloric-obstruction-in-an-elderly-woman-with-a-giant-hiatal-hernia-a-case-report
#20
Hideyuki Saito, Tatsuya Miyazaki, Makoto Sohda, Makoto Sakai, Hiroaki Honjyo, Yuuji Kumakura, Tomonori Yoshida, Takehiko Yokobori, Koji Kurosawa, Hiroyuki Kuwano
BACKGROUND: Hiatal hernias are common. In some reports, hiatal hernias have been implicated in causing dyspnea, syncope, and heart failure. CASE PRESENTATION: An 82-year-old woman with a hiatal hernia was admitted to our hospital because she had experienced postprandial syncope during the last few years. Esophagogastroduodenoscopy revealed a large hiatal hernia and a pedunculated polyp of the stomach antrum that fit into the pylorus. An upper gastrointestinal contrast study showed that the entire stomach had relocated to the thoracic cavity and that the body of the stomach was located above the fundus, resulting in a so-called upside-down stomach...
December 13, 2017: Surgical Case Reports
keyword
keyword
36334
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"