Full Text Journal Articles by
Author Shumpei Mori

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Understanding the Aortic Root Using Computed Tomographic Assessment: A Potential Pathway to Improved Customized Surgical Repair.

Justin T Tretter, Yu Izawa, Diane E Spicer, Kenji Okada, Robert H Anderson, James A Quintessenza, Shumpei Mori,

There is continued interest in surgical repair of both the congenitally malformed aortic valve, and the valve with acquired dysfunction. Aortic valvar repair based on a geometric approach has demonstrated improved durability and outcomes. Such an approach requires a thorough comprehension of the complex 3-dimensional anatomy of both the normal ... Read more >>

Circ Cardiovasc Imaging (Circulation. Cardiovascular imaging)
[2021, 14(11):e013134]

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Iatrogenic Atrioventricular Block.

Christopher C Cheung, Shumpei Mori, Edward P Gerstenfeld,

Iatrogenic atrioventricular (AV) block can occur in the context of cardiac surgery, percutaneous transcatheter, or electrophysiologic procedures. In cardiac surgery, patients undergoing aortic and/or mitral valve surgery are at the highest risk for developing perioperative AV block requiring permanent pacemaker implantation. Similarly, patients undergoing transcatheter aortic valve replacement are also ... Read more >>

Card Electrophysiol Clin (Cardiac electrophysiology clinics)
[2021, 13(4):711-720]

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Varied Extent of Mitral Annular Disjunction Among Cases With Different Phenotypes of Mitral Valve Prolapse.

Hiroyuki Toh, Shumpei Mori, Yu Izawa, Takayoshi Toba, Yoshiaki Watanabe, Atsushi K Kono, Ken-Ichi Hirata,

Detailed 3-dimensional analysis of mitral annular disjunction was undertaken in 3 comparative cases of mitral valve prolapse. A case of Barlow disease showed extensive disjunction, whereas cases of fibroelastic deficiency and forme fruste demonstrated less extensive disjunction. Considering the current controversies surrounding disjunction, these observations call for detailed research in the ... Read more >>

JACC Case Rep (JACC. Case reports)
[2021, 3(10):1251-1257]

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Revival of Mitral and Tricuspid Annular Disjunctions: Are These Really Abnormal Findings?

Hiroyuki Toh, Shumpei Mori, Yu Izawa, Takayoshi Toba, Tatsuya Nishii, Ken-Ichi Hirata,

JACC Cardiovasc Imaging (JACC. Cardiovascular imaging)
[2021, 14(8):1682-1684]

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Further Insights Into a Classic Arrhythmia: The Long Journey Involving P1 and P2 Potentials.

Shumpei Mori, Osamu Fujimura,

JACC Clin Electrophysiol (JACC. Clinical electrophysiology)
[2021, 7(7):855-857]

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Real three-dimensional cardiac imaging using leading-edge holographic display.

Shumpei Mori, Kalyanam Shivkumar,

Understanding three-dimensional cardiac anatomy is fundamental for the practice of clinical cardiology. However, if three-dimensional images are displayed on two-dimensional monitors, they fail to provide depth perception. Currently, novel technologies, including the three-dimensional printing, three-dimensional monitors/projectors, and virtual reality applications can provide real three-dimensionality with depth perception. However, their relatively ... Read more >>

Clin Anat (Clinical anatomy (New York, N.Y.))
[2021, 34(6):966-968]

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Comprehensive Anatomy of the Pericardial Space and the Cardiac Hilum: Anatomical Dissections With Intact Pericardium.

Shumpei Mori, Peter Hanna, Michael J Dacey, Taro Temma, Joseph Hadaya, Ching Zhu, Grace Chang, Warwick J Peacock, Michael C Fishbein, Kalyanam Shivkumar,

JACC Cardiovasc Imaging (JACC. Cardiovascular imaging)
[2021, :]

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The aortic valve with four leaflets: how should we best describe this blue moon?

Justin T Tretter, Shumpei Mori, Diane E Spicer, Robert H Anderson,

Eur Heart J Cardiovasc Imaging (European heart journal. Cardiovascular Imaging)
[2021, 22(7):777-780]

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How to Use Intracardiac Echocardiography to Recognize Normal Cardiac Anatomy.

Houman Khakpour, Shumpei Mori, Jason S Bradfield, Kalyanam Shivkumar,

This article reviews cardiac anatomy as it pertains to commonly used intracardiac echocardiography segments and views. ... Read more >>

Card Electrophysiol Clin (Cardiac electrophysiology clinics)
[2021, 13(2):273-283]

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Prevalence and extent of mitral annular disjunction in structurally normal hearts: comprehensive 3D analysis using cardiac computed tomography.

Hiroyuki Toh, Shumpei Mori, Yu Izawa, Hiroshi Fujita, Keisuke Miwa, Masataka Suzuki, Yu Takahashi, Takayoshi Toba, Yoshiaki Watanabe, Atsushi K Kono, Justin T Tretter, Ken-Ichi Hirata,

<h4>Aims</h4>Mitral annular disjunction is fibrous separation between the attachment of the posterior mitral leaflet and the basal left ventricular myocardium initially described in dissected hearts. Currently, it is commonly evaluated by echocardiography, and potential relationships with mitral valve prolapse and ventricular arrhythmia have been suggested. However, controversy remains as its ... Read more >>

Eur Heart J Cardiovasc Imaging (European heart journal. Cardiovascular Imaging)
[2021, 22(6):614-622]

Cited: 2 times

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Rotational Position of the Aortic Root is Associated with Increased Aortic Dimensions in Marfan and Loeys-Dietz Syndrome.

Shannon K Powell, Hassan Almeneisi, Tarek Alsaied, Amy Shikany, Laura Riley, Erin Miller, Alyce Belonis, Kathryn Nicole Weaver, Nicole Brown, Shumpei Mori, Justin T Tretter,

Progressive aortic dilation is common in Marfan syndrome (MFS) and Loeys-Dietz syndrome (LDS). Risk factors for progression are poorly understood. Normal variation in the aortic root (AoR) rotational position relative to the left ventricular base may impact this risk. We aimed to assess the relationship between the rotational position of ... Read more >>

Pediatr Cardiol (Pediatric cardiology)
[2021, 42(5):1157-1161]

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Stereoscopic three-dimensional anatomy of the heart: another legacy of Dr. Wallace A. McAlpine.

Shumpei Mori, Kalyanam Shivkumar,

Anat Sci Int (Anatomical science international)
[2021, 96(3):485-488]

Cited: 1 time

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Innervation and Neuronal Control of the Mammalian Sinoatrial Node a Comprehensive Atlas.

Peter Hanna, Michael J Dacey, Jaclyn Brennan, Alison Moss, Shaina Robbins, Sirisha Achanta, Natalia P Biscola, Mohammed A Swid, Pradeep S Rajendran, Shumpei Mori, Joseph E Hadaya, Elizabeth H Smith, Stanley G Peirce, Jin Chen, Leif A Havton, Zixi Jack Cheng, Rajanikanth Vadigepalli, James Schwaber, Robert L Lux, Igor Efimov, John D Tompkins, Donald B Hoover, Jeffrey L Ardell, Kalyanam Shivkumar,

[Figure: see text]. ... Read more >>

Circ Res (Circulation research)
[2021, 128(9):1279-1296]

Cited: 5 times

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Massive Air Embolism During Atrial Fibrillation Ablation: Averting Disaster in a Time of Crisis.

Duc H Do, Houman Khakpour, Yuliya Krokhaleva, Shumpei Mori, Jason Bradfield, Noel G Boyle, Kalyanam Shivkumar,

A 62-year-old male with symptomatic persistent atrial fibrillation underwent radiofrequency catheter ablation. During exchange of the saline irrigation bag, the patient developed sudden hypotension and bradycardia and was found to have a massive air embolism. Air was successfully aspirated with catheters, and the patient did not suffer any permanent sequelae. ... Read more >>

JACC Case Rep (JACC. Case reports)
[2021, 3(1):47-52]

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Evaluation of microvasculopathy using dual-energy computed tomography in patients with chronic thromboembolic pulmonary hypertension.

Hiroyuki Onishi, Yu Taniguchi, Yoichiro Matsuoka, Kenichi Yanaka, Yu Izawa, Yasunori Tsuboi, Shumpei Mori, Atsushi Kono, Kazuhiko Nakayama, Noriaki Emoto, Ken-Ichi Hirata,

The existence of microvasculopathy in patients with chronic thromboembolic pulmonary hypertension has been suggested. Recently, dual-energy computed tomography has been used to produce a sensitive iodine distribution map in lung fields to indicate microvasculopathy according to poor subpleural perfusion. Our aim was to evaluate the impact of microvasculopathy on pathophysiology ... Read more >>

Pulm Circ (Pulmonary circulation)
[2021, 11(1):2045894020983162]

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Three-dimensional visualization of the bovine cardiac conduction system and surrounding structures compared to the arrangements in the human heart.

Marcos C De Almeida, Shumpei Mori, Robert H Anderson,

In the human heart, the atrioventricular node is located toward the apex of the triangle of Koch, which is also at the apex of the inferior pyramidal space. It is adjacent to the atrioventricular portion of the membranous septum, through which it penetrates to become the atrioventricular bundle. Subsequent to ... Read more >>

J Anat (Journal of anatomy)
[2021, 238(6):1359-1370]

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Normative Aortic Valvar Measurements in Adults Using Cardiac Computed Tomography - A Potential Guide to Further Sophisticate Aortic Valve-Sparing Surgery.

Yu Izawa, Shumpei Mori, Justin T Tretter, James A Quintessenza, Hiroyuki Toh, Takayoshi Toba, Yoshiaki Watanabe, Atsushi K Kono, Kenji Okada, Ken-Ichi Hirata,

<h4>Background</h4>A thorough understanding of the anatomy of the aortic valve is necessary for aortic valve-sparing surgery. Normal valvar dimensions and their relationships in the living heart, however, have yet to be fully investigated in a 3-dimensional fashion.Methods and Results:In total, 123 consecutive patients (66±12 years, Men 63%) who underwent coronary computed tomographic ... Read more >>

Circ J (Circulation journal : official journal of the Japanese Circulation Society)
[2021, 85(7):1059-1067]

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Absence of Myocardial Support at the Base of the Left Coronary Aortic Sinus in a Patient With Ehlers-Danlos Syndrome.

Hiroyuki Toh, Shumpei Mori, Yu Izawa, Takayoshi Toba, Ken-Ichi Hirata,

Circ J (Circulation journal : official journal of the Japanese Circulation Society)
[2021, 85(2):220]

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Visualization of intensive atrial inflammation and fibrosis after cryoballoon ablation: PET/MRI and LGE-MRI analysis.

Kunihiko Kiuchi, Koji Fukuzawa, Munenobu Nogami, Yoshiaki Watanabe, Mitsuru Takami, Yu Izawa, Noriyuki Negi, Katsusuke Kyotani, Shumpei Mori, Ken-Ichi Hirata,

<h4>Background</h4>Atrial inflammation plays an important role in initiating atrial fibrosis, which could perpetuate atrial fibrillation (AF). However, the method of visualization of atrial inflammation has not been established. We sought to investigate whether the intensive atrial inflammation caused by cryoballoon ablation (CBA) could be detected by positron emission tomography/ magnetic ... Read more >>

J Arrhythm (Journal of arrhythmia)
[2021, 37(1):52-59]

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Simple Stereoscopic Display of 3-Dimensional Living Heart Anatomy Relevant to Electrophysiological Practice.

Shumpei Mori, Yu Izawa, Tatsuya Nishii,

Comprehensive appreciation of the 3-dimensional anatomy of the living heart is essential for accurate diagnosis and establishment of safe interventional treatment by clinical electrophysiologists. Three-dimensional images displayed on a 2-dimensional surface usually undergo distortion and are not considered a real 3-dimensional representation because they cannot provide accurate depth perception. Currently, ... Read more >>

JACC Clin Electrophysiol (JACC. Clinical electrophysiology)
[2020, 6(12):1473-1477]

Cited: 2 times

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Innervation and Neuronal Control of the Mammalian Sinoatrial Node: A Comprehensive Atlas

Peter Hanna, Michael Dacey, Jaclyn Brennan, Alison Moss, Shaina Robbins, Sirisha Achanta, Natalia Biscola, Mohammed Swid, Pradeep Rajendran, Shumpei Mori, Joseph Hadaya, Elizabeth Smith, Stanley Peirce, Jin Chen, Leif Havton, Zixi (Jack) Cheng, Rajanikanth Vadigepalli, James Schwaber, Robert Lux, Igor Efimov, John Tompkins, Donald Hoover, Jeffrey Ardell, Kalyanam Shivkumar,

Cardiac function is under exquisite intrinsic cardiac neural control. Neuroablative techniques to modulate control of cardiac function are currently being studied in patients, albeit with variable and sometimes deleterious results. Recognizing the major gaps in our understanding of cardiac neural control, we sought to evaluate neural regulation of impulse initiation ... Read more >>

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Wall Shear Stress and Plaque Vulnerability: Computational Fluid Dynamics Analysis Derived From cCTA and OCT.

Takayoshi Toba, Hiromasa Otake, Gilwoo Choi, Hyun Jin Kim, Hiroyuki Onishi, Yoichiro Sugizaki, Ryo Takeshige, Akira Nagasawa, Yuichiro Nagano, Yoshiro Tsukiyama, Kenichi Yanaka, Hiroyuki Yamamoto, Hiroyuki Kawamori, Shumpei Mori, Masahito Kawata, Charles A Taylor, Ken-Ichi Hirata,

JACC Cardiovasc Imaging (JACC. Cardiovascular imaging)
[2021, 14(1):315-317]

Cited: 2 times

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Virtual Dissection: Emerging as the Gold Standard of Analyzing Living Heart Anatomy.

Justin T Tretter, Saurabh Kumar Gupta, Yu Izawa, Tatsuya Nishii, Shumpei Mori,

Traditionally, gross cardiac anatomy has been described mainly based on the findings in the dissection suite. Analyses of heart specimens have contributed immensely towards building a fundamental knowledge of cardiac anatomy. However, there are limitations in analyzing the autopsied heart removed from the thorax. Three-dimensional imaging allows visualization of the ... Read more >>

J Cardiovasc Dev Dis (Journal of cardiovascular development and disease)
[2020, 7(3):]

Cited: 1 time

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Lesion characteristics between cryoballoon ablation and radiofrequency ablation with a contact force-sensing catheter: Late-gadolinium enhancement magnetic resonance imaging assessment.

Jun Kurose, Kunihiko Kiuchi, Koji Fukuzawa, Mitsuru Takami, Shumpei Mori, Hideya Suehiro, Yu-Ichi Nagamatsu, Tomomi Akita, Makoto Takemoto, Atsusuke Yatomi, Toshihiro Nakamura, Jun Sakai, Yoshiaki Watanabe, Shinsuke Shimoyama, Noriyuki Negi, Katsusuke Kyotani, Ken-Ichi Hirata,

<h4>Background</h4>Pulmonary vein isolation (PVI) lesions after cryoballoon ablation (CBA) are characterized as a wider and more continuous than that after conventional radiofrequency catheter ablation (RFCA) without the contact force (CF)-sensing technology. However, the impact on the lesion characteristics of ablation with a CF-sensing catheter has not been well discussed. We ... Read more >>

J Cardiovasc Electrophysiol (Journal of cardiovascular electrophysiology)
[2020, 31(10):2572-2581]

Cited: 1 time

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Anatomy of the Pericardial Space.

Justin Hayase, Shumpei Mori, Kalyanam Shivkumar, Jason S Bradfield,

The pericardial cavity and its boundaries are formed by the reflections of the visceral and parietal pericardial layers. This space is an integral access point for epicardial interventions. As the pericardial layers reflect over the great vessels and the heart, they form sinuses and recesses, which restrict catheter movement. The ... Read more >>

Card Electrophysiol Clin (Cardiac electrophysiology clinics)
[2020, 12(3):265-270]

Cited: 1 time

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