-433-ANALYSIS OF PHASIC VELOCITY WAVEFORM AND FLOW VELOCITY PROFILE IN HUMAN NORMAL LEFT CORONARY ARTERY : Coronary Circulation : FREE COMMUNICATIONS(II) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
スポンサーリンク
概要
- 論文の詳細を見る
- 社団法人日本循環器学会の論文
- 1989-06-20
著者
-
Ogasawara Yasuo
Department Of Medical Engineering And Systems Cardiology
-
YAMANE HISAYOSHI
Department of Thoracic Surgery, Kawasaki Medical School
-
Kiyooka Takahiko
Department Of Physiology Kawasaki Medical School
-
Fujiwara Takashi
Division Of Thoracic And Cardiovascular Surgery Department Of Surgery Kawasaki Medical School
-
Matsuoka Shuji
Department Of Medical Engineering And Systems Cardiology Kawasaki Medical School
-
Matsuoka Shuji
Cardiovascular Surgery Medical Engineering Kawasaki Medical School
-
Matsuoka Shuji
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Ogasawara Yasuo
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Hiramatsu Osamu
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Tsujioka Katsuhiko
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Kajiya Fumihiko
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Fujuwara Takashi
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Nogami Stsushi
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Yamane Hisayoshi
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Yoshida Hiroshi
Depertment of Medical Engineering and Systems Cardiology,and Thoracic Cardiovasculer Surgery, Kawasa
-
Nogami Stsushi
Depertment Of Medical Engineering And Systems Cardiology And Thoracic Cardiovasculer Surgery Kawasak
-
Tsujioka Katsuhiko
Department Of Physiology Kawasaki Medical University
-
Yamane Hisayoshi
Depertment Of Medical Engineering And Systems Cardiology And Thoracic Cardiovasculer Surgery Kawasak
-
Fujiwara T
Kawasaki Medical School Kurashiki Jpn
-
Kajiya Fumihiko
Department Of Cardiovascular Physiology Okayama University Graduate School Of Medicine And Dentistry
-
Yamane Hisayoshi
Depertment Of Medical Engineering And Systems Cardiology And Thoracic Cardiovasculer Surgery Kawasaki Medical School
-
Yoshida Hiroshi
Department Of Thoracic Surgery Kawasaki Medical School
-
Yoshida Hiroshi
Depertment Of Medical Engineering And Systems Cardiology And Thoracic Cardiovasculer Surgery Kawasaki Medical School
関連論文
- Slow-Flow Phenomenon during Percutaneous Coronary Intervention in Acute Myocardial Infarction : An Intravascular Ultrasound Study
- The Influences of Hemodialysis and AV-Shunt on Bilateral Internal Thoracic Artery Flows : An Ultrasound Study
- Quantitation of the Degree of Mitral Valve Prolapse by Novel Software System : New Insights From Transthoracic Real-Time Three-Dimensional Echocardiography
- Three-Dimensional Echocardiographic Measurements of Distance Between Papillary Muscles and Mitral Annulus : Assessment With Three-Dimensional Quantification Software System
- Three-Dimensional Geometry of Aortic Valve : A new Trial of Visualization With Real-Time Three-Dimensional Echocardiography
- Noninvasive Measurements of the Mitral Annulus Geometry by Newly-developed Quantitation Software With Real-time Three-dimensional Echocardiography : A Validation Study
- OE-120 Dynamics of the Mitral Annular Geometry during Cardiac Cycle : New Insights from Real-time Three-Dimensional Echocardiography with a Novel Software System(Echo/Doppler-02, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- Dynamics of Mitral Complex Geometry and Functional Mitral Regurgitation During Heart Failure Treatment : Real-time Three-dimensional Echocardiographic Study
- PJ-385 Geometric Changes of Tricuspid Leaflets and Annulus in Atrial Septal Defect : Quantitation by Novel Software System With Real-time 3D Echocardiography(Echo/Doppler-11 (I) PJ65,Poster Session (Japanese),The 70th Anniversary Annual Scientific Meeting
- OJ-271 Dynamics of Mitral Complex Geometry and Functional Mitral Regurgitation during Heart Failure Treatment : Real-time Three-dimensional Echocardiographic Study(Echo/Doppler-5 (I) OJ46,Oral Presentation (Japanese),The 70th Anniversary Annual Scientific
- Mitral Leaflets and Annulus Geometry in Ischemic Mitral Regurgitation : Assessment by Newly Developed Anatomical Image Creation System With Three-dimensional Echocardiography(Diagnosis and Treatment of Valvular Heart Disease-Multidiciplinary Treatment of
- Progression of Post-Arteritis Lesions into Atherosclerotic Plaques in Kawasaki Disease(Congenital Heart Disease/Kawasaki's Disease 3 (M), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- Mucosa-associated lymphoid tissue lymphoma in the thymus of a patient with systemic lupus erythematosus
- X-ray Spectra from a Brass-target Plasma Triode
- Inhomogeneous Vasodilatory Responses of Rat Tail Arteries to Heat Stress : Evaluation by Synchrotron Radiation Microangiography
- PJ-533 Role of H_2O_2 as an Endogenous EDHF during Coronary Occlusion and Injection of Erythropoietin in Canine Coronary Native Collateral Microvessels(PJ090,Coronary Circulation/Chronic Coronary Disease (Basic/Clinical) (IHD),Poster Session (Japanese),Th
- ペンシル型CCD生体顕微鏡システムを用いたin vivo肺微小循環と個々の肺胞の同時可視化と機能解析
- Measurement of Cerium X-ray Spectra Using a Cerium Oxide Powder Filter and Enhanced K-edge Angiography
- X-ray Spectra from a Characteristic X-ray Generator with a Molybdenum Tube
- Monochromatic polycapillary imaging utilizing a computed radiography system
- In Vivo Reactive Hyperemic Response in Canine Coronary Capillary Network Visualized by Intravital Pencil Lens-Probe CCD Videomicroscopy
- Direct in vivo visualization of rat coronary capillary hemodynamics by intravital pencil lens-probe CCD videomicroscopy
- In-vivo observation of adenosine effects on glomerular circulation in a rabbit kidney with a CCD intravital videomicroscope
- -0670-EVALUATION OF REGIONAL WORK ACROSS THE LEFT VENTRICULAR WALL BY A ULTRASOUND PULSED DOPPLER TRACKING SYSTEM
- PJ-249 Crucial Role of H_2O_2 as an Endogenous EDHF and Erythropoietin during Acute Coronary Occlusion in Canine Collateral Microvessels in Vivo(Coronary circulation, basic/clinical(03)(IHD),Poster Session(Japanese),The 72nd Annual Scientific Meeting of t
- OJ-060 Role of Cu, Zn-SOD in the Synthesis of Endothelium-Derived Hyperpolarizing Factor (EDHF) during Reactive Hyperemia in Mouse Mesenteric Microcirculation in Vivo(Endothelium-2, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- OE-143 Role of Endogenous Hydrogen Peroxide in Tachypacing-Induced Metabolic Coronary Vasodilatation in Canine Coronary Microcirculation in Vivo(Coronary circulation, basic/clinical-1, The 71st Annual Scientific Meeting of the Japanese Circulation Society
- PE-558 Cardioprotective Role of Hydrogen Peroxide as an Endogenous EDHF during Ischemia-reperfusion Injury in Canine Coronary Microvessels in Vivo(Coronary circulation, basic/clinical-3 (IHD) PE95,Poster Session (English),The 70th Anniversary Annual Scien
- OE-211 Crucial Role of Hydrogen Peroxide as an Endogenous EDHF during Pacing-Induced Metabolic Dilatation in Canine Coronary Microvessels in Vivo(Coronary circulation, basic/clinical-1 (IHD) OE36,Oral Presentation (English),The 70th Anniversary Annual Sci
- OE-203 Important Role of Cu/Zn-SOD in the Synthesis of Endothelium-Derived Hyperpolarizing Factor during Reactive Hyperemia in Mouse Mesenteric Microvessels in Vivo(Endothelium-1 (H) OE34,Oral Presentation (English),The 70th Anniversary Annual Scientific
- Protective Role of Hydrogen Peroxide, an Endogenous EDHF, in Coronary Ischemia/Reperfusion Injury in Canine Coronary Microvessels in Vivo(Endothelial Function (H), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- Beneficial Role of Hydroxyfasudil, a Specific Rho-kinase Inhibitor, on Ischemia-Reperfusion Injury in Canine Coronary Microvessels in Vivo(Endothelial Function (H), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- OE-128 Myocardial Protective Role of Hydrogen Peroxide, an Endogenous EDHF, in Coronary Autoregulation in Canine Subepicardial Microcirculation in Vivo(Coronary Circulation, Basic/Clinical 2 (IHD) : OE15)(Oral Presentation (English))
- FRS-055 Beneficial Role of Hydroxyfasudil, a Specific Rho-kinase Inhibitor, on Ischemia-Reperfusion Injury in Canine Coronary Microvessels(Oxidative Stress, Autonomic Function and Peripheral Vascular Diseases (H) : FRS7)(Featured Research Session (English
- Exponential Fitting of Postextrasystolic Potentiation May Underestimate the Cardiac Ca^ Recirculation Fraction : A Theoretical Analysis
- Three-Dimensional Micro-Architecture of Left Ventricular Myocytes Orientations Can Be Detected by SPring-8 X-ray Diffraction
- PJ-394 Beneficial Effects of Erythropoietin on Cardiac Remodeling after Myocardial Infarction(Growth factor/Cytokine-3 (H) PJ67,Poster Session (Japanese),The 70th Anniversary Annual Scientific Meeting of the Japanese Circulation Society)
- PJ-270 Microbubble Destruction with Ultrasound Augments Neovascularization by Bone Marrow Cell Transplantation in Rat Hindlimb Ischemia(Peripheral circulation-7 (H) PJ46,Poster Session (Japanese),The 70th Anniversary Annual Scientific Meeting of the Japan
- Effects of Cell Transplantation Using Vascular Endothelial Growth Factor-Expressing Mesenchymal Stem Cells for Myocardial Infarction(Acute Myocardial Infarction, Basic 1 (IHD), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- The Long-Acting Ca^-Channel Blocker Azelnidipine Prevents Left Ventricular Remodeling After Myocardial Infarction
- Effects of Treatment for Diabetes Mellitus on Circulating Vascular Progenitor Cells
- The Effects of HMG-CoA Reductase Inhibitor on Vascular Progenitor Cells
- Effects of Erythropoietin on Cardiac Remodeling After Myocardial Infarction
- Granulocyte-Colony Stimulating Factor Augments Neovascularization Induced by Bone Marrow Transplantation in Rat Hindlimb Ischemia
- Three-dimensional quantitative analysis of glomerular microcirculatoion in diabetic nephropathy using syncrotron radiation X-ray micro-CT
- Increases in the Endothelial Cell-to-Substrate Gap and Endothelial Cell deformability after Monocyte adhesion : Importance of Nano/Micro-mechanics of Endothelial Cells in the Monocyte Transmigration Process(Micro- and Nano-biomechanics)
- Altered Nano-Order, Micro-Mechanical Property of Pulmonary Artery Smooth Muscle in Primary Pulmonary Hypertension
- Edaravone Preserves Coronary Microvascular Endothelial Function After Ischemia/Reperfusion on the Beating Canine Heart In Vivo
- 5 Scavenging Reactive Oxygen Species by Edaravone Preserves Coronary Microvascular Endothelial Function Myocardial eNOS Expression on Ischemia/Reperfusion Injury In Vivo Beating Canine Heart(Young Investigator's Award for International Students Finalists
- OE-302 Progressive Hyperfiltration at the Early Stage of Diabetes in a Rat(OE51,Peripheral Circulation/Vascular Disease (Pathophysiology, Basic) (H),Oral Presentation (English),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)
- Visualisation of the Effects of Dilazep on Rat Afferent and Efferent Arterioles In Vivo
- Novel Rat Model of Ischemic Cardiomyopathy Induced by Repetitive Myocardial Ischemia/Reperfusion Injury While Conscious
- PE-573 In-vivo Visualization Study Revealed a Physiological Nephroprotective Significance of Adenosine Augmented by Dilazep(Regeneration (angiogenesis/myocardial regeneration)-4, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- OE-124 Geometric Changes of Tricuspid Valve after Pulmonary Embolism Quantified by Novel System with Real-Time Three-Dimensional Echocardiography(Echo/Doppler-02, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- OE-114 Visualisation of Renal Microcirculation and Filtration in STZ-induced Diabetic Rats(Diabetes/Obesity/Metabolic syndrome-01, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- 1 Advances in the Evaluation of Mitral Complex Geometry : Insights From Transthoracic Real-Time Three-dimensional Echocardiography(Advances in Three-dimensional Cardiovascular Imaging, The 71st Annual Scientific Meeting of the Japanese Circulation Society
- PJ-012 Nicorandil Could Induce NO Production in Coronary Circulation. : Real-time Measurement Using a Catheter-type NO Sensor(Coronary circulation, basic/clinical-4 (IHD) PJ2,Poster Session (Japanese),The 70th Anniversary Annual Scientific Meeting of the
- Hydrogen peroxide, an endogenous EDHF, plays a crucial role in coronary autoregulation
- In Vivo, Real Time Visualization of the Interaction between Perialveolar Microcirculation and Individual Alveolar Respiration in Rats
- OE-258 Land-mine explosion in capillary : direct in vivo observation of microbubble destruction with ultrasound(Echo/Doppler 12 (I) : OE32)(Oral Presentation (English))
- CORONARY OSTIAL ENDARTERECTOMY IN TAKAYASU'S AORTITIS : Confirmation of Patency Nine Years Postsurgically
- -P135- INTRAOPERATIVE ASSESSMENT OF FLOW CHARACTERISTICS IN CORONARY STENOSIS BY 20MHz MULTIGATED PULSED DOPPLER VELOCIMETRY
- -164- EVALUATION OF CORONARY BLOOD FLOW IN AORTIC REGURGITATION DURING VALVULAR REPLACEMENT SURGERY : Myocardial Infarction, Valvular Heart Disease : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SO
- -P106- A STUDY OF PHASIC FLOW PATTERNS AND RESERVED CAPA CITY OF BYPASS GRAFT FLOW IN AORTOCORONARY BYPASS GRAFTING PATIENTS
- EFFECTS OF HEMATOCRIT AND FLUOROCARBON ON CORONARY PRESSURE-FLOW RELATION : Coronary Circulation (I) : FREE COMMUNICATIONS (III) : PROCEEDINGS OF THE 49th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- -434-CHANGES IN PULSATION CHARACTERISTICS OF CORONARY BLOOD FLOW FOLLOWING VALVULAR REPLACEMENT FOR AORTIC STENOSIS IN HUMANS : Coronary Circulation : FREE COMMUNICATIONS(II) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION
- -433-ANALYSIS OF PHASIC VELOCITY WAVEFORM AND FLOW VELOCITY PROFILE IN HUMAN NORMAL LEFT CORONARY ARTERY : Coronary Circulation : FREE COMMUNICATIONS(II) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- MEASUREMENTS OF HUMAN CORONARY BLOOD FLOW VELOCITY DURING OPEN CHEST SURGERY BY HIGH RESOLUTION MULTIGATED PULSED DOPPLER VELOCIMETER : Coronary Circulation (I) : FREE COMMUNICATIONS (III) : PROCEEDINGS OF THE 49th ANNUAL SCIENTIFIC MEETING OF THE JAPANES
- FRS-085 Development of a Catheter-type Nitric Oxide Sensor for Coronary Sinus(NO and Cardiovascular System (H) : FRS10)(Featured Research Session (English))
- Visualisation of In-Vivo Renal Glomerular Microcirculation under DIC and Its Treatment by a PAF Inhibition and Heparin
- Exchange Transfusion with Liposomal Hemoglobin Reduces the Microheterogeneity of Regional Myocardial Perfusion while Preserving Coronary Vasomotor Tone(Coronary Circulation, Basic/Clinical 5 (IHD), The 69th Annual Scientific Meeting of the Japanese Circul
- Geometrical Demonstration and Three-Dimensional Quantitative Analysis of the Mitral Valve With Real-Time Three-Dimensional Echocardiography : Novel Anatomical Image Creation System
- Microcirculatory heterogeneity of myocardial oxygen supply-consumption balance and flow in crystalloid-perfused rat hearts under hypoxia
- NO Synthase Inhibitor, ADMA Increases and Cofactor, BH_4 Decreases in Human Internal Thoracic Arteries with Decrease of Coronary Flow Reserve
- Decreased heterogeneity of myocardial blood flow distribution after reactive hyperemia at a microvascular unit level evaluated by molecular flow tracers
- PE-594 Pivotal Contribution of Platelets to Disseminated Intravascular Coagulation(Kidney/Renal circulation-3 (H) PE104,Poster Session (English),The 70th Anniversary Annual Scientific Meeting of the Japanese Circulation Society)
- Effect of Artificial Red Blood Cells on Renal Microcirculation and Tissue Oxygen in DIC Rats(Thrombosis/Thrombolysis 2 (IHD), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- Uncoordinated Local Contraction of the Myocytes Can Propel Cardiac Lymph without Effective Development of LV Pressure
- Visualization of Cardiac Lymphatic Dynamics with Levovist in Beating Canine Hearts Using a High-Speed CCD Microscope
- OJ-210 Rescue of DIC with artificial red blood cells evaluated by blood flow velocities(Blood Coagulation/Fibrinolysis (IHD) : OJ24)(Oral Presentation (Japanese))
- Ca^ response and its propagation in cultured endothelial cells to cytosolic micro-strain by laser tweezers
- ANALYSIS OF CARDIAC LYMPHATIC DYNAMICS WITH LEVOVIST IN BEATING CANINE HEARTS USING A HIGH-SPEED CCD MICROSCOPE
- Effect of Nicorandil, a K^+_-Channel Opener, on Coronary Capillary Architecture and Volume After Early Myocardial Ischemia-Reperfusion : A 3-Dimensional Confocal Laser Microscopic Study
- Three-Dimensional Microstructural Abnormality of the Coronary Capillary Network After Myocardial Reperfusion : Comparison Between 'Reflow' and 'No-Reflow'
- Prevention of DIC Induced Glomerular Ischaemia by PAF Inhibition(Peripheral Circulation/Vascular Disease 2 (H), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- A biological role of the glycocalyx for shear-induced endothetium-derived nitric oxide production
- ACCURACY OF 20 MHz DOPPLER CATHETER CORONARY ARTERY VELOCIMETRY FOR MEASUREMENT OF CORONARY BLOOD FLOW VELOCITY : Echocardiography, Pulsed Doppler : 53 Annual Scientific Meeting, Japanese Circulation Society
- -436-CHARACTERISTICS OF BLOOD VELOCITY WAVEFORMS IN THE LEFT ATRIAL SMALL CORONARY ARTERY AND VEIN : Coronary Circulation : FREE COMMUNICATIONS(II) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Mechanical Control of Coronary Artery Inflow and Vein Outflow : SIMPOSIUM ON EXPERIMENTAL AND CLINICAL TOPICS IN THE REGULATION OF THE CIRCULATION
- -97- EVALUATION OF A LASER DOPPLER BLOOD VELOCIMETER WITH AN OPTICAL DUAL FIBER PICKUP FOR VELOCITY MEASUREMENTS : Pulmonary Circulation, Papillary Circulation : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CI
- -27- THE EFFECTS OF THE RHEOLOGICAL PROPERTIES OF BLOOD ON DIASTOLIC CORONARY ARTERY PRESSURE-FLOW RELATIONSHIPS : Coronary Circulation : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- -26 -EFFECT OF THE INTRAMYOCARDIAL CAPACITANCE VESSELS ON DIASTOLIC CORONARY PRESSURE FLOW RELATIONSHIP : Coronary Circulation : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- EVALUATION OF FUNCTIONAL CHARACTERISTICS OF THE INTRAMYOCARDIAL CAPACITANCE VESSELS : Coronary Circulation : PROCEEDINGS OF THE 50th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- -322-MEASUREMENT OF THE REGIONAL CURVATURE RADIUS OF THE LEFT VENTRICLE AND EVALUATION OF REGIONAL MYOCARDIAL FUNCTION BY THE PIEZOELECTRIC POLYMER CURVATURE SENSOR
- CORONARY VENOUS FLOW MEASUREMENTS BY A NEWLY DEVELOPED CATHETER-TYPE LASER DOPPLER VELOCIMETER : Coronary Circulation (I) : FREE COMMUNICATIONS (III) : PROCEEDINGS OF THE 49th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- DEACTIVATION INDUCED BY ACTIVE SHORTENING IN CARDIAC SARCOMERE : Cardiac Function (I) : FREE COMMUNICATIONS (I) : PROCEEDINGS OF THE 49th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Role of ADMA, BH_4, oxidative stress and antioxidant effect of HMG-CoA reductase inhibitor in insulin resistant Zucker fatty rat
- Cardioprotective Role of Edaravone in Coronary Ischemia/Reperfusion Injury in Canine Coronary Microvessels in Vivo : A Study by Intravital Microscopy(Coronary Circulation, Basic/Clinical 1 (IHD), The 69th Annual Scientific Meeting of the Japanese Circulat
- -452-EVALUATION OF EFFECTS OF CORONARY ARTERY STENOSIS ON THE INTRAMYOCARDIAL BLOOD FLOW VELOCITY PATTERN : Ischemic Heart Disease I : FREE COMMUNICATIONS(II) : PROCEEDINGS OF THE 53th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Impact of chronic cyanosis and reoxygenation on the microheterogeneity of the myocardial blood flow : digital radiographic study in neonatal rats