The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Takashi Kubo - One of the best experts on this subject based on the ideXlab platform.
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prevalence and clinical significance of Papillary Muscle infarction detected by late gadolinium enhanced magnetic resonance imaging in patients with st segment elevation myocardial infarction
Circulation, 2010Co-Authors: Takashi Tanimoto, Toshio Imanishi, Hironori Kitabata, Nobuo Nakamura, Keizo Kimura, Takashi Yamano, Kohei Ishibashi, Kenichi Komukai, Shigeho Takarada, Takashi KuboAbstract:Background—The frequency of Papillary Muscle infarction (PapMI) without rupture has not been fully investigated in vivo. Furthermore, the relationship between Papillary Muscle dysfunction and mitral regurgitation (MR) has been controversial in patients with ST-segment elevation myocardial infarction. Therefore, the aim of this study was to assess the frequency and clinical characteristics of PapMI without rupture using late gadolinium-enhanced magnetic resonance imaging (MRI) in patients with ST-segment elevation myocardial infarction. Methods and Results—One hundred eighteen ST-segment elevation myocardial infarction patients with primary percutaneous coronary intervention underwent cardiac MRI twice 9±4 days and 8±1 months (n=104) after myocardial infarction. MR was categorized by echocardiography. Of these patients, 40% were found to have late gadolinium enhancement of Papillary Muscle, in which the posterior Papillary Muscle was involved more frequently than the anterior Papillary Muscle (77% versus 2...
Takashi Tanimoto - One of the best experts on this subject based on the ideXlab platform.
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prevalence and clinical significance of Papillary Muscle infarction detected by late gadolinium enhanced magnetic resonance imaging in patients with st segment elevation myocardial infarction
Circulation, 2010Co-Authors: Takashi Tanimoto, Toshio Imanishi, Hironori Kitabata, Nobuo Nakamura, Keizo Kimura, Takashi Yamano, Kohei Ishibashi, Kenichi Komukai, Shigeho Takarada, Takashi KuboAbstract:Background—The frequency of Papillary Muscle infarction (PapMI) without rupture has not been fully investigated in vivo. Furthermore, the relationship between Papillary Muscle dysfunction and mitral regurgitation (MR) has been controversial in patients with ST-segment elevation myocardial infarction. Therefore, the aim of this study was to assess the frequency and clinical characteristics of PapMI without rupture using late gadolinium-enhanced magnetic resonance imaging (MRI) in patients with ST-segment elevation myocardial infarction. Methods and Results—One hundred eighteen ST-segment elevation myocardial infarction patients with primary percutaneous coronary intervention underwent cardiac MRI twice 9±4 days and 8±1 months (n=104) after myocardial infarction. MR was categorized by echocardiography. Of these patients, 40% were found to have late gadolinium enhancement of Papillary Muscle, in which the posterior Papillary Muscle was involved more frequently than the anterior Papillary Muscle (77% versus 2...
Andrew E Epstein - One of the best experts on this subject based on the ideXlab platform.
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ventricular tachycardia originating from the posterior Papillary Muscle in the left ventricleclinical perspective
Circulation-arrhythmia and Electrophysiology, 2008Co-Authors: Harish Doppalapudi, Takumi Yamada, Thomas H Mcelderry, Vance J Plumb, Andrew E EpsteinAbstract:Background— Several distinct forms of focal ventricular tachycardia (VT) from the left ventricle (LV) have been described. We report a new syndrome of VT arising from the base of the posterior Papillary Muscle in the LV. Methods and Results— Among 290 consecutive patients who underwent ablation for VT or symptomatic premature ventricular complexes (PVCs) based on a focal mechanism, 7 patients were found to have an ablation site at the base of the posterior Papillary Muscle in the LV. All patients had normal LV systolic function and a normal baseline electrocardiogram. The electrocardiogram during VT or PVCs demonstrated a right bundle-branch block and superior-axis QRS morphology in all patients. VT was not inducible by programmed atrial or ventricular stimulation. In 2 patients with sustained VT, overdrive pacing neither terminated VT nor demonstrated any criterion for transient entrainment. Activation mapping localized the earliest site of activation to the base of the posterior Papillary Muscle in all patients. When Purkinje potentials were recorded at the site of successful ablation, these potentials preceded local ventricular Muscle potentials during sinus rhythm. During VT or PVCs, however, the ventricular Muscle potential always preceded the Purkinje potentials. After recurrence of VT or PVCs with standard radiofrequency ablation, irrigated ablation was successful in eliminating the arrhythmia in all patients. Over a mean follow-up period of 9 months, all patients have been free of PVCs and VT. Conclusion— We present a distinct syndrome of VT arising from the base of the posterior Papillary Muscle in the LV by a nonreentrant mechanism. Ablation can be challenging, and irrigated ablation may be necessary for long-term success. Received February 15, 2007; accepted December 24, 2007. # CLINICAL PERSPECTIVE {#article-title-2}
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ventricular tachycardia originating from the posterior Papillary Muscle in the left ventricle a distinct clinical syndrome
Circulation-arrhythmia and Electrophysiology, 2008Co-Authors: Harish Doppalapudi, Takumi Yamada, Thomas H Mcelderry, Vance J Plumb, Andrew E EpsteinAbstract:Background: Several distinct forms of focal ventricular tachycardia (VT) from the left ventricle (LV) have been described. We report a new syndrome of VT arising from the base of the posterior Papillary Muscle in the LV. Methods and results: Among 290 consecutive patients who underwent ablation for VT or symptomatic premature ventricular complexes (PVCs) based on a focal mechanism, 7 patients were found to have an ablation site at the base of the posterior Papillary Muscle in the LV. All patients had normal LV systolic function and a normal baseline electrocardiogram. The electrocardiogram during VT or PVCs demonstrated a right bundle-branch block and superior-axis QRS morphology in all patients. VT was not inducible by programmed atrial or ventricular stimulation. In 2 patients with sustained VT, overdrive pacing neither terminated VT nor demonstrated any criterion for transient entrainment. Activation mapping localized the earliest site of activation to the base of the posterior Papillary Muscle in all patients. When Purkinje potentials were recorded at the site of successful ablation, these potentials preceded local ventricular Muscle potentials during sinus rhythm. During VT or PVCs, however, the ventricular Muscle potential always preceded the Purkinje potentials. After recurrence of VT or PVCs with standard radiofrequency ablation, irrigated ablation was successful in eliminating the arrhythmia in all patients. Over a mean follow-up period of 9 months, all patients have been free of PVCs and VT. Conclusions: We present a distinct syndrome of VT arising from the base of the posterior Papillary Muscle in the LV by a nonreentrant mechanism. Ablation can be challenging, and irrigated ablation may be necessary for long-term success.
Shigeho Takarada - One of the best experts on this subject based on the ideXlab platform.
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prevalence and clinical significance of Papillary Muscle infarction detected by late gadolinium enhanced magnetic resonance imaging in patients with st segment elevation myocardial infarction
Circulation, 2010Co-Authors: Takashi Tanimoto, Toshio Imanishi, Hironori Kitabata, Nobuo Nakamura, Keizo Kimura, Takashi Yamano, Kohei Ishibashi, Kenichi Komukai, Shigeho Takarada, Takashi KuboAbstract:Background—The frequency of Papillary Muscle infarction (PapMI) without rupture has not been fully investigated in vivo. Furthermore, the relationship between Papillary Muscle dysfunction and mitral regurgitation (MR) has been controversial in patients with ST-segment elevation myocardial infarction. Therefore, the aim of this study was to assess the frequency and clinical characteristics of PapMI without rupture using late gadolinium-enhanced magnetic resonance imaging (MRI) in patients with ST-segment elevation myocardial infarction. Methods and Results—One hundred eighteen ST-segment elevation myocardial infarction patients with primary percutaneous coronary intervention underwent cardiac MRI twice 9±4 days and 8±1 months (n=104) after myocardial infarction. MR was categorized by echocardiography. Of these patients, 40% were found to have late gadolinium enhancement of Papillary Muscle, in which the posterior Papillary Muscle was involved more frequently than the anterior Papillary Muscle (77% versus 2...
Takashi Yamano - One of the best experts on this subject based on the ideXlab platform.
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prevalence and clinical significance of Papillary Muscle infarction detected by late gadolinium enhanced magnetic resonance imaging in patients with st segment elevation myocardial infarction
Circulation, 2010Co-Authors: Takashi Tanimoto, Toshio Imanishi, Hironori Kitabata, Nobuo Nakamura, Keizo Kimura, Takashi Yamano, Kohei Ishibashi, Kenichi Komukai, Shigeho Takarada, Takashi KuboAbstract:Background—The frequency of Papillary Muscle infarction (PapMI) without rupture has not been fully investigated in vivo. Furthermore, the relationship between Papillary Muscle dysfunction and mitral regurgitation (MR) has been controversial in patients with ST-segment elevation myocardial infarction. Therefore, the aim of this study was to assess the frequency and clinical characteristics of PapMI without rupture using late gadolinium-enhanced magnetic resonance imaging (MRI) in patients with ST-segment elevation myocardial infarction. Methods and Results—One hundred eighteen ST-segment elevation myocardial infarction patients with primary percutaneous coronary intervention underwent cardiac MRI twice 9±4 days and 8±1 months (n=104) after myocardial infarction. MR was categorized by echocardiography. Of these patients, 40% were found to have late gadolinium enhancement of Papillary Muscle, in which the posterior Papillary Muscle was involved more frequently than the anterior Papillary Muscle (77% versus 2...
