International journal of cardiac imaging最新文献_第2页

Adipose replacement and wall motion abnormalities in right ventricle arrhythmias: evaluation by MR imaging. Retrospective evaluation on 124 patients. 右心室心律失常的脂肪替代和壁运动异常:磁共振成像的评价。124例患者回顾性分析。

International journal of cardiac imaging Pub Date : 2000-04-01 DOI: 10.1023/a:1006304626233

G Molinari, F Sardanelli, F Zandrino, R C Parodi, G Bertero, E Richiardi, P Di Donna, F Gaita, M A Masperone

{"title":"Adipose replacement and wall motion abnormalities in right ventricle arrhythmias: evaluation by MR imaging. Retrospective evaluation on 124 patients.","authors":"G Molinari, F Sardanelli, F Zandrino, R C Parodi, G Bertero, E Richiardi, P Di Donna, F Gaita, M A Masperone","doi":"10.1023/a:1006304626233","DOIUrl":"https://doi.org/10.1023/a:1006304626233","url":null,"abstract":"We reevaluated the magnetic resonance (MR) examinations of 38 healthy volunteers (control group, CG) and of 124 patients with RV arrhythmia with left bundle branch block (LBBB) morphology: 45 with episodes of RV sustained tachycardia and of polymorphic RV premature beats (RVST-PPB group); 36 with only RV outflow tract sustained or not sustained tachycardia (RVOTT group); 43 with RV monomorphic premature beats (RVMPB group). All the examinations were reevaluated in a blinded fashion for detecting myocardial adipose replacement (AR) and wall bulges or aneurysms. In RVST-PPB patients, no AR was observed in 9%; 1 RV region involvement, 0%; 2 regions, 4%; > or = 3 regions, 87%; left ventricle (LV), 15%. RVOTT patients: 28%, 53%, 14%, 5%, and 0% [corrected], respectively. RVMPB patients: 33%, 46%, 19%, 2%, and 0% [corrected], respectively. In CG, AR was observed in 11% (in RV outflow tract), RV bulges were detected in 75% [corrected] of RVST-PPB, 39% of RVOTT, and 14% of RVMPB patients, none of the CG; RV aneurysms in 33% of RVST-PPB patients, none of RVOTT patients, RVMBP patients, and CG. A significant difference among groups for RV and LV AR as well as RV bulges and aneurysms was found (p < 0.0001). In the direct comparisons, significant differences were found for: disease duration (RVST-PPB vs. RVMPB, p = 0.0396); RV AR (all the patients groups vs. CG, RVST-PPB vs. RVOTT or RVMPB, p < 0.0001); RV aneurysms (RVST-PPB vs. CG, RVST-PPB vs. RVOTT or RVMPB, p < 0.0002); bulges (all comparisons, p < 0.0174). AR is confirmed as a structural substrate in RV arrhythmias. Number and extension of MR abnormalities are correlated to different degrees of RV arrhythmias.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 2","pages":"105-15"},"PeriodicalIF":0.0,"publicationDate":"2000-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006304626233","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21767318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

3D assessment of myocardial perfusion parameter combined with 3D reconstructed coronary artery tree from digital coronary angiograms. 结合数字冠状动脉造影三维重建冠状动脉树的心肌灌注参数三维评价。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006216221695

T H Schindler, N Magosaki, M Jeserich, E Nitzsche, U Oser, T Abdollahnia, M Nageleisen, M Zehender, H Just, U Solzbach

{"title":"3D assessment of myocardial perfusion parameter combined with 3D reconstructed coronary artery tree from digital coronary angiograms.","authors":"T H Schindler, N Magosaki, M Jeserich, E Nitzsche, U Oser, T Abdollahnia, M Nageleisen, M Zehender, H Just, U Solzbach","doi":"10.1023/a:1006216221695","DOIUrl":"https://doi.org/10.1023/a:1006216221695","url":null,"abstract":"In patients with coronary artery disease coronary angiography plays an important role in the clinical decision-making process. However, it has been recognized that no simple relation exists between the visually or quantitatively evaluated severity of coronary artery stenoses and its effects on regional myocardial perfusion. This paper describes for the first time the development and application of a 3D technique that visualizes and quantifies regional myocardial perfusion parameters from biplane coronary angiograms by using the impulse response analysis technique. The 3D reconstructed coronary tree is automatically superimposed on the 3D perfusion image to generate and visualize an 'integrated' 3D image. The preliminary results in patients with critical coronary artery stenoses indicate that our combined 3D fusion image provides flow information from the major coronary arteries. This 3D fusion image may provide useful information in the management of patients with coronary artery disease.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006216221695","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21676809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Computerized left ventricular pressure-volume relationships (pV-loops) using disposable angiographic tip transducer pigtail catheters. 利用一次性血管造影尖端换能器尾状导管，计算机化左心室压力-容积关系(pV-loops)。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006349123217

U Raff, T F Culclasure, C Clark, L Overturf, B M Groves

{"title":"Computerized left ventricular pressure-volume relationships (pV-loops) using disposable angiographic tip transducer pigtail catheters.","authors":"U Raff, T F Culclasure, C Clark, L Overturf, B M Groves","doi":"10.1023/a:1006349123217","DOIUrl":"https://doi.org/10.1023/a:1006349123217","url":null,"abstract":"Left ventricular pressure-volume relationships expressed as pV loops could yield important hemodynamic information in the cardiac catheterization laboratory. Many clinical situations might benefit from a quantitative assessment of left ventricular function. Potential applications of pV loops include the assessment of vasoactive and inotropic drugs, balloon valvuloplasty, coronary angioplasty, and surgical treatment of valvular heart disease. For many years the clinical use of pV loops has been hindered by logistical difficulties. The ability to merge on-line concurrent digital imaging data for computation of left ventricular volume and digital left ventricular pressure wave forms obtained from high fidelity tip-transducer angiocatheters has allowed us to develop a technique which can generate pV loops during cardiac catheterization procedures. The method offers an automated measurement of left ventricular volume independent of edge detection or an interactive technique for tracing endocardial borders by a trained operator. Illustrative case studies are included to demonstrate the potential of the method during ventricular angiographic procedures. Implementation and computational time requirements of the method are discussed. The concept and the value of pV loop generation to study left ventricular performance has been known for many years. Combining digital imaging and digital physiologic data obtained with disposable tip-transducer angiocatheters with modern networking technology, the technique can more easily be applied to catheterization procedures and could enhance invasive hemodynamic assessment of left ventricular function.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 1","pages":"13-21"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006349123217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21676810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Echocardiographic evaluation of left ventricular function in pure mitral stenosis. 超声心动图评价单纯二尖瓣狭窄患者左心室功能。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006341200771

S R Mittal, R S Goozar

引用次数: 2

Mechanical properties and imaging characteristics of remanufactured intravascular ultrasound catheters. 再制造血管内超声导管的力学性能和影像学特征。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006310612175

R Hoffmann, P Haager, G Mintz, H Klues

{"title":"Mechanical properties and imaging characteristics of remanufactured intravascular ultrasound catheters.","authors":"R Hoffmann, P Haager, G Mintz, H Klues","doi":"10.1023/a:1006310612175","DOIUrl":"https://doi.org/10.1023/a:1006310612175","url":null,"abstract":"Intravascular ultrasound (IVUS) as a routine device in interventional cardiology is handicapped by its high price. 19 factory-made, 'remanufactured' IVUS catheters which consist of sterilized, used phased-array IVUS transducers inserted into a new catheter shaft were compared with 23 new IVUS catheters. 3 mechanical and 4 imaging characteristics were assessed on a 5 point scale (1 = unacceptable, 5 = excellent). Mechanical as well as imaging properties of 'remanufactured' IVUS catheter were comparable to new catheters with excellent ratings for each of the evaluated characteristics in 38 to 94% of 'remanufactured' catheters and 50 to 96% of new catheters. The initial failure rate for 'remanufactured' IVUS catheters was 31.6% vs. 4.3% for new catheters (P < 0.05). Overall failure rate was 47.3% for \"remanufactured\" catheters vs. 8.7% for new catheters (P < 0.05). The failure was due to an electronic connecting problem occurring during mechanical stress to the IVUS catheter. In conclusion, 'remanufactured' IVUS catheters offer mechanical and imaging characteristics which are comparable to new catheters. Improvements in the 'remanufacturing' process to resolve the high rate of electronic connecting problems may make this a promising approach to substantially lower the price of IVUS catheters.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 1","pages":"23-7"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006310612175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21676811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Imaging of an aneurysm of the sinus of Valsalva with transesophageal echocardiography, contrast angiography and MRI. 经食道超声心动图、血管造影及MRI对瓦尔萨尔瓦窦动脉瘤的成像。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006389116701

L H Baur, H W Vliegen, E E van der Wall, M Hazekamp, M Bootsma, A de Roos, A V Bruschke

引用次数: 9

Chylous ascites due to constrictive pericarditis. 缩窄性心包炎所致乳糜性腹水。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006379625554

S Güneri, C Nazli, O Kinay, O Kirimli, C Mermut, E Hazan

引用次数: 22

Reduced early diastolic inflow velocities in the antero-posterior transverse direction in the left ventricle of patients with dilated cardiomyopathy. 扩张型心肌病患者左心室前后横方向舒张早期血流速度降低。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006315127220

S Fujimoto, Y Nakagawa, R Mizuno, S Nakanishi, K Dohi

{"title":"Reduced early diastolic inflow velocities in the antero-posterior transverse direction in the left ventricle of patients with dilated cardiomyopathy.","authors":"S Fujimoto, Y Nakagawa, R Mizuno, S Nakanishi, K Dohi","doi":"10.1023/a:1006315127220","DOIUrl":"https://doi.org/10.1023/a:1006315127220","url":null,"abstract":"Unlabelled: In patients with dilated cardiomyopathy (DCM), the left ventricular (LV) inflow jet is narrow and has a high pressure gradient. A pulsed Doppler restrictive transmitral flow pattern is a characteristic feature of severe left ventricular disease. However, Doppler flow analysis is limited by the angle between the blood flow jet and the ultrasonic beam. In this study we used gated magnetic resonance imaging (MRI) to investigate the inflow velocity in the LV transverse directions during early diastole in patients with DCM.Methods: We studied 10 patients with DCM (mean age: 47 y). Ten age-matched healthy volunteers were also examined. Gradient echo images of the LV were obtained. Left ventricular short axis phase contrast images were obtained at the level of the mitral valve tip and 1 cm inside the LV. Long axis images were also obtained. Through-plane peak velocities at peak early diastolic filling were measured along the LV long axis, antero-posterior short axis, and right-left short axis. Blood velocity was measured in 50 ms blocks.Results: Early diastolic inflow velocity along the long axis, especially at the center of the LV, was well preserved in DCM. However, the inflow velocity in the antero-posterior transverse direction of the LV (i.e., in the direction of mitral valve excursion) was significantly reduced in DCM.Conclusions: Early diastolic inflow velocity in the antero-posterior transverse direction of the LV is reduced in patients with DCM indicating that the vector component of the forces acting in the antero-posterior transverse direction of the LV may be decreased in patients with DCM during early diastolic filling.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 1","pages":"43-8"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006315127220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21677412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An iso-integral mapping technique using magnetocardiogram, and its possible use for diagnosis of ischemic heart disease. 利用心磁图的等积分制图技术及其在缺血性心脏病诊断中的可能应用。

International journal of cardiac imaging Pub Date : 2000-02-01 DOI: 10.1023/a:1006376326755

K Tsukada, T Miyashita, A Kandori, T Mitsui, Y Terada, M Sato, J Shiono, H Horigome, S Yamada, I Yamaguchi

{"title":"An iso-integral mapping technique using magnetocardiogram, and its possible use for diagnosis of ischemic heart disease.","authors":"K Tsukada, T Miyashita, A Kandori, T Mitsui, Y Terada, M Sato, J Shiono, H Horigome, S Yamada, I Yamaguchi","doi":"10.1023/a:1006376326755","DOIUrl":"https://doi.org/10.1023/a:1006376326755","url":null,"abstract":"We have developed an iso-integral mapping technique that uses magneto-cardiogram (MCG) data to obtain a map as projected total current image on the torso from the heart. We have also investigated the applicability of iso-integral mapping to the diagnosis of ischemic heart disease. We simulated and measured the characteristics of two types of iso-integral maps: one using tangential (Bxy) components, and one using the normal component (Bz). Each vector component was measured by two types of superconducting quantum interference device (SQUID) system to determine the tangential and normal components. The tangential component of the magnetic field appeared to be equivalent to the current image in the myocardium projected on the observing plane, and we were able to obtain a projected total current image by integration of the tangential components during the depolarization and repolarization processes. And we found that the iso-integral maps of normal hearts showed similar pattern in both processes; however, those of ischemic hearts showed different patterns.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"16 1","pages":"55-66"},"PeriodicalIF":0.0,"publicationDate":"2000-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006376326755","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21677414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 56

The seismocardiogram as magnetic-field-compatible alternative to the electrocardiogram for cardiac stress monitoring. 地震心电图作为磁场兼容的替代心电图用于心脏应激监测。

International journal of cardiac imaging Pub Date : 1999-12-01 DOI: 10.1023/a:1006364518204

M Jerosch-Herold, J Zanetti, H Merkle, L Poliac, H Huang, A Mansoor, F Zhao, N Wilke

{"title":"The seismocardiogram as magnetic-field-compatible alternative to the electrocardiogram for cardiac stress monitoring.","authors":"M Jerosch-Herold, J Zanetti, H Merkle, L Poliac, H Huang, A Mansoor, F Zhao, N Wilke","doi":"10.1023/a:1006364518204","DOIUrl":"https://doi.org/10.1023/a:1006364518204","url":null,"abstract":"Seismocardiography (SCG) is a methodology derived from the field of seismology to measure non-invasively compression waves generated by myocardial motion. The use of SCG is proposed here as method to monitor cardiac function during stress testing and magnetic resonance imaging (MRI). It is shown that recording of the seismocardiogram in subjects undergoing an MRI study is not compromised by flow-induced electrical voltages that can severely distort the electrocardiogram. Electromagnetic compatibility of the seismocardiograph device with the MRI scanner hardware was tested. Experiments in an animal model proved that changes in the SCG waveform during different levels of LAD stenosis correlate with the changes seen in LV function with cine MRI. The changes in the SCG waveform characteristic for the onset of ischemia were observed almost immediately after the creation of a flow-limiting stenosis. This novel application of SCG to monitor changes in peak acceleration from cardiac blood flow and wall motion may represent a solution to the long-standing and important problem of monitoring patients for signs of myocardial ischemia during MRI.","PeriodicalId":77179,"journal":{"name":"International journal of cardiac imaging","volume":"15 6","pages":"523-31"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1023/a:1006364518204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21618695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32