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M. Nii · SciRah

Researcher profile · Semantic Scholar

M. Nii

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M. Nii — researcher profile on SciRah

h-index: 22
Works: 91
Citations: 1,601

Most-cited papers

Assessment of fetal atrioventricular time intervals by tissue Doppler and pulse Doppler echocardiography: normal values and correlation with fetal electrocardiography
M. Nii, ROBERT M. Hamilton, Laura Fenwick, J. Kingdom +2 more
2006Heart119 citations Open access
Semantic Scholar
Pulsed wave Doppler tissue echocardiography assessment of the long axis function of the right and left ventricles during the early neonatal period
K. Mori, Ryuji Nakagawa, M. Nii, T. Edagawa +3 more
2004Heart119 citations Open access
Semantic Scholar
Borderline hypoplasia of the left ventricle in neonates: insights for decision-making from functional assessment with magnetic resonance imaging.
L. Grosse-Wortmann, Tae-Jin Yun, Osman O. Al-Radi, Siho Kim +5 more
2008Journal of Thoracic and Cardiovascular Surgery107 citations Open access
Semantic Scholar
Recommendations for Multimodality Assessment of Congenital Coronary Anomalies: A Guide from the American Society of Echocardiography: Developed in Collaboration with the Society for Cardiovascular Angiography and Interventions, Japanese Society of Echocardiography, and Society for Cardiovascular Mag
P. Frommelt, L. Lopez, V. Dimas, B. Eidem +8 more
2020Journal of the American Society of Echocardiography97 citations Open access
Semantic Scholar
Determinants of outcome in fetal pulmonary valve stenosis or atresia with intact ventricular septum.
Kevin S. Roman, J. Fouron, M. Nii, J. Smallhorn +2 more
2007American Journal of Cardiology90 citations
Semantic Scholar
Antenatal Therapy for Fetal Supraventricular Tachyarrhythmias: Multicenter Trial.
T. Miyoshi, Y. Maeno, T. Hamasaki, N. Inamura +16 more
2019Journal of the American College of Cardiology76 citations Open access
Semantic Scholar
Fetal brady- and tachyarrhythmias: new and accepted diagnostic and treatment methods.
E. Jaeggi, M. Nii
2005Seminars in Fetal & Neonatal Medicine69 citations
Semantic Scholar
Assessment of the evolution of normal fetal diastolic function during mid and late gestation by spectral Doppler tissue echocardiography.
M. Nii, Kevin S. Roman, J. Kingdom, A. Redington +1 more
2006Journal of the American Society of Echocardiography63 citations
Semantic Scholar
Plasma Levels of Natriuretic Peptide and Echocardiographic Parameters in Patients with Duchenne's Progressive Muscular Dystrophy
K. Mori, Tetsuya Manabe, M. Nii, Y. Hayabuchi +2 more
2002Pediatric Cardiology63 citations
Semantic Scholar
Short and midterm results of aortic valve cusp extension in the treatment of children with congenital aortic valve disease.
B. Alsoufi, T. Karamlou, T. Bradley, W. Williams +6 more
2006Annals of Thoracic Surgery62 citations
Semantic Scholar
Three-dimensional echocardiography improves the understanding of left atrioventricular valve morphology and function in atrioventricular septal defects undergoing patch augmentation.
C. Barrea, S. Levasseur, Kevin S. Roman, M. Nii +3 more
2005Journal of Thoracic and Cardiovascular Surgery55 citations Open access
Semantic Scholar
Three-dimensional tricuspid annular function provides insight into the mechanisms of tricuspid valve regurgitation in classic hypoplastic left heart syndrome.
M. Nii, V. Guerra, Kevin S. Roman, C. Macgowan +1 more
2006Journal of the American Society of Echocardiography53 citations
Semantic Scholar
Circumstances and outcomes of out-of-hospital cardiac arrest in elementary and middle school students in the era of public-access defibrillation.
Y. Mitani, Kunio Ohta, F. Ichida, M. Nii +15 more
2014Circulation Journal48 citations Open access
Semantic Scholar
Three-dimensional echocardiography improves the understanding of the mechanisms and site of left atrioventricular valve regurgitation in atrioventricular septal defect.
Ken Takahashi, V. Guerra, Kevin S. Roman, M. Nii +2 more
2006Journal of the American Society of Echocardiography45 citations
Semantic Scholar
JCS 2021 Guideline on the Clinical Application of Echocardiography.
N. Ohte, T. Ishizu, C. Izumi, H. Itoh +37 more
2022Circulation Journal42 citations Open access
Semantic Scholar
Predictors of liver cirrhosis and hepatocellular carcinoma among perioperative survivors of the Fontan operation
R. Inuzuka, M. Nii, K. Inai, E. Shimada +16 more
2022Heart36 citations
Semantic Scholar
Insight into normal mitral and tricuspid annular dynamics in pediatrics: a real-time three-dimensional echocardiographic study.
M. Nii, Kevin S. Roman, C. Macgowan, J. Smallhorn
2005Journal of the American Society of Echocardiography35 citations
Semantic Scholar
Anomalous origin of the coronary artery coursing between the great vessels presenting with a cardiovascular event (J-CONOMALY Registry).
K. Nagashima, T. Hiro, D. Fukamachi, Y. Okumura +63 more
2019European Heart Journal-Cardiovascular Imaging32 citations Open access
Semantic Scholar
Antenatal antiarrhythmic treatment for fetal tachyarrhythmias: a study protocol for a prospective multicentre trial
T. Miyoshi, Y. Maeno, H. Sago, N. Inamura +17 more
2017BMJ Open26 citations Open access
Semantic Scholar
Peak negative myocardial velocity gradient and wall-thickening velocity during early diastole are noninvasive parameters of left ventricular diastolic function in patients with Duchenne's progressive muscular dystrophy.
K. Mori, T. Edagawa, M. Inoue, M. Nii +4 more
2004Journal of the American Society of Echocardiography26 citations
Semantic Scholar
Incidence and Expected Probability of Liver Cirrhosis and Hepatocellular Carcinoma After Fontan Operation.
M. Nii, R. Inuzuka, K. Inai, E. Shimada +16 more
2021Circulation24 citations Open access
Semantic Scholar
New insight into the intraventricular pressure gradient as a sensitive indicator of diastolic cardiac dysfunction in patients with childhood cancer after anthracycline therapy
S. Shigemitsu, Ken Takahashi, K. Yazaki, Maki Kobayashi +8 more
2019Heart and Vessels22 citations Open access
Semantic Scholar
Assessment of early diastolic intraventricular pressure gradient in the left ventricle among patients with repaired tetralogy of Fallot
Maki Kobayashi, Ken Takahashi, M. Yamada, K. Yazaki +10 more
2017Heart and Vessels22 citations Open access
Semantic Scholar
In-Depth Insight Into the Mechanisms of Cardiac Dysfunction in Patients With Childhood Cancer After Anthracycline Treatment Using Layer-Specific Strain Analysis.
K. Yazaki, Ken Takahashi, S. Shigemitsu, M. Yamada +8 more
2017Circulation Journal21 citations Open access
Semantic Scholar
Development of suction force during early diastole from the left atrium to the left ventricle in infants, children, and adolescents
Ken Takahashi, M. Nii, K. Takigiku, M. Toyono +10 more
2018Heart and Vessels20 citations
Semantic Scholar
Cardiac fetal ultrasonographic parameters for predicting outcomes of isolated left-sided congenital diaphragmatic hernia.
M. Yamoto, Yasuhiko Tanaka, K. Fukumoto, H. Miyake +6 more
2015Journal of Pediatric Surgery20 citations
Semantic Scholar
Real-Time Subcostal 3-Dimensional Echocardiography for Guided Percutaneous Atrial Septal Defect Closure
Kevin S. Roman, M. Nii, F. Golding, L. Benson +1 more
200418 citations
Semantic Scholar
In-Depth Insight Into the Mechanisms of Cardiac Dysfunction in Patients With Type 1 Diabetes Mellitus Using Layer-Specific Strain Analysis.
Takeshi Iso, Ken Takahashi, K. Yazaki, M. Ifuku +10 more
2019Circulation Journal17 citations Open access
Semantic Scholar
Fetal bradyarrhythmia associated with congenital heart defects - nationwide survey in Japan.
T. Miyoshi, Y. Maeno, H. Sago, N. Inamura +18 more
2015Circulation Journal16 citations Open access
Semantic Scholar
The impact of intrauterine treatment on fetal tachycardia: a nationwide survey in Japan
K. Ueda, Y. Maeno, T. Miyoshi, N. Inamura +14 more
2018Journal of Maternal-Fetal & Neonatal Medicine15 citations
Semantic Scholar
Doppler tissue imaging in the assessment of atrioventricular conduction time: validation of a novel technique and comparison with electrophysiologic and pulsed wave Doppler-derived equivalents in an animal model.
M. Nii, M. Shimizu, Kevin S. Roman, I. Konstantinov +3 more
2006Journal of the American Society of Echocardiography14 citations
Semantic Scholar
Comparison of late post-operative cardiopulmonary responses in the Fontan versus ventricular septation for double-inlet left ventricular repair.
H. Ohuchi, Ken-ichi Watanabe, K. Kishiki, M. Nii +3 more
2007American Journal of Cardiology13 citations
Semantic Scholar
Isovolumic but not ejection phase Doppler tissue indices detect left ventricular dysfunction caused by coronary stenosis.
M. Shimizu, M. Nii, I. Konstantinov, Jia Li +1 more
2005Journal of the American Society of Echocardiography13 citations
Semantic Scholar
Predictors of long-term mortality among perioperative survivors of Fontan operation.
K. Inai, R. Inuzuka, H. Ono, M. Nii +14 more
2021European Heart Journal10 citations
Semantic Scholar
Retrograde holodiastolic flow in the abdominal aorta detected by pulsed Doppler echocardiography in patients with Kawasaki disease
K. Mori, Y. Hayabuchi, Y. Kuroda, M. Nii +2 more
2000European Journal of Pediatrics9 citations
Semantic Scholar
Quantification of the myocardial velocity gradient and myocardial wall thickening velocity in healthy children: a new indicator of regional myocardial wall motion.
M. Nii, K. Mori, Y. Kuroda
2002Journal of the American Society of Echocardiography8 citations
Semantic Scholar
Measurement of Aortic Valve Coaptation and Effective Height Using Echocardiography in Patients with Ventricular Septal Defects and Aortic Valve Prolapse
S. Iwashima, Hiroki Uchiyama, Takamichi Ishikawa, K. Takigiku +4 more
2017Pediatric Cardiology7 citations
Semantic Scholar
Assessment of the Developmental Change in the Left Atrial Volume Using Real Time Three‐Dimensional Echocardiography
Noboru Tanaka, K. Takigiku, Ken Takahashi, Ayako Kuraoka +8 more
2015Echocardiography7 citations Open access
Semantic Scholar
Editorial: What is this cleavage of mitral valve – Commissure, indentation, cleft, or cleft-like indentation?
M. Nii
2015Journal of Cardiology Cases6 citations Open access
Semantic Scholar
The impact of patch augmentation on left atrioventricular valve dynamics in patients with atrioventricular septal defects: early and midterm follow-up.
Kevin S. Roman, M. Nii, C. Macgowan, C. Barrea +2 more
2006Journal of the American Society of Echocardiography6 citations
Semantic Scholar
Congenital Coronary Anomalies
M. Nii
20165 citations Open access
Semantic Scholar
Images in cardiovascular medicine. Real-time subcostal 3-dimensional echocardiography for guided percutaneous atrial septal defect closure.
Kevin S. Roman, M. Nii, F. Golding, L. Benson +1 more
2004Circulation5 citations
Semantic Scholar
Angiographic diagnosis for accurate assessment of CPSS and EHPVO in children.
Yuji Doi, Sung-Hae Kim, Mizuhiko Ishigaki, Keisuke Sato +6 more
2021Pediatrics International4 citations
Semantic Scholar
PHACE syndrome with unnoticeable skin lesion and rare anomaly of coronary artery
Akinori Sekioka, K. Fukumoto, Y. Horikoshi, M. Nii +1 more
2019Pediatrics International4 citations
Semantic Scholar
Outcomes of hypertrophic cardiomyopathy in Japanese children: a retrospective cohort study
Hiroki Mori, T. Yoshikawa, H. Kimura, H. Ono +12 more
2021Heart and Vessels3 citations
Semantic Scholar
Outcomes of Dilated Cardiomyopathy in Japanese Children - A Retrospective Cohort Study.
Hiroki Mori, T. Yoshikawa, H. Kimura, H. Ono +12 more
2021Circulation Journal3 citations Open access
Semantic Scholar
Role of BRCA1-associated protein (BRAP) variant in childhood pulmonary arterial hypertension
Ayako Chida-Nagai, Masaki Shintani, Hiroki Sato, Tomotaka Nakayama +8 more
2019PLoS ONE3 citations Open access
Semantic Scholar
Prenatally diagnosed hypoplastic left heart syndrome with intact atrial septum and ventriculocoronary arterial fistula
N. Kitamura, M. Nii, Sung-Hae Kim, N. Mitsushita +3 more
2010Journal of Echocardiography3 citations
Semantic Scholar
Heart Failure in the Fetus
L. Hornberger, M. Nii
20053 citations
Semantic Scholar
Digital subtraction angiography, magnetic resonance imaging and echocardiographic findings in patients with an anomalous subaortic left brachiocephalic vein
M. Nii, S. Matsuoka, K. Mori, Y. Hayabuchi +2 more
1997Cardiology in the Young3 citations
Semantic Scholar

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Kevin S. Roman×11
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Kevin S. Roman — researcher profile on SciRah
J. Smallhorn×8
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Ken Takahashi×8
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Ken Takahashi — researcher profile on SciRah
K. Mori×6
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S. Yasukochi×6

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E. Jaeggi — researcher profile on SciRah

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A. Redington — researcher profile on SciRah