OOIR: Observatory of International Research

Papers

(The TQCC of JACC-Cardiovascular Interventions is 2. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-06-01 to 2025-06-01.)

Article	Citations
Transcatheter Treatment of Concomitant Aortic Stenosis and Tricuspid Regurgitation	175
Improving Cardiac Outcomes Among Patients With Severe Chronic Kidney Disease	136
Prominent Collateral Vessels in Pulmonary Vein Occlusion	121
Percutaneous Removal of a Left Atrial Papillary Fibroelastoma Using AlphaVac Aspiration Thrombectomy	121
Inside This Issue	113
A 15-Year-Old Adolescent With Obstructive Shock and Emerging Thrombus	110
Short Duration of DAPT vs De-Escalation After Percutaneous Coronary Intervention for Acute Coronary Syndromes	104
Novel Approach to Percutaneous Closure of an RCA Fistula via the Coronary Sinus	104
Should Postprocedure Anticoagulation Be Routinely Needed in Acute STEMI Patients Undergoing Primary PCI?	102
CRT-700.38 Racial Disparities in Transcatheter Aortic Valve Replacement in Japanese Compared With Western Patients	94
CRT-700.68 Long QT Syndrome in Transcatheter Aortic Valve Replacement: Complications and Prognostic Outcomes	91
INSIDE THIS ISSUE	91
CRT-700.79 Short- and Long-Term Outcomes in Symptomatic Patients With Hypertrophic Obstructive Cardiomyopathy Undergoing Alcohol Septal Ablation: Experience in a Referral Center	91
Optimizing the Use of Artificial Intelligence in Cardiology in 2024	90
Successful Transcollateral Bidirectional Balloon Pulmonary Angioplasty in a Patient With Chronic Thromboembolic Pulmonary Hypertension	88
Reply	87
Radiation Dose in Diagnostic Cardiac Catheterization	85
Multiple Coronary Aneurysms Post–Drug-Eluting Stenting	84
Half-Dose DOAC After Watchman Implantation	83
CRT-300.05 Atherectomy Use Is Associated With Lower Rates of Major Adverse Limb Events Among Adults Undergoing Femoropopliteal Interventions: Insights From the Vascular Quality Initiative Registry	82
CRT-600.10 Combining VA-ECMO and Impella (EC-Pella) Before Reperfusion Mitigates Left Ventricular Loading and Injury Due to VA-ECMO in Acute Myocardial Infarction	79
CRT-400.09 Impact of Statin on Non-Culprit Coronary Lesions and Adverse Events: Insight From LRP Study	77
CRT-400.03 Effect of High-intensity Statin Therapy on Atherosclerosis in Non-Infarct-Related Coronary Arteries (IBIS-4): A Machine Learning-Based Analysis of IVUS	77
CRT-100.9 Comparison for Use of Telmisartan and Candesartan on 3-Year Clinical Outcomes After Acute Myocardial Infarction in Korean Population: From the Korea Acute Myocardial Infarction Registry-Nati	76
CRT-100.20 Radiation Doses Using a Novel Radiation Protection System: A Single-Center Prospective Observational Study	75

Distal Target Vessel Characterization in CTO Vessels	74
Thin-Strut BRS	74
500.10 From Chest Pain to Coronary Functional Testing: Clinical and Economic Impact of Coronary Microvascular Dysfunction	73
200.13 Trends of Pulmonary Embolism and Cancer Related Mortality in the United States From 1999-2020	71
100.37 Procedural and Clinical Outcomes After Intravascular Lithotripsy in Patients Undergoing Percutaneous Coronary Intervention for In-Stent Restenosis	71
100.07 ABSTRACT WITHDRAWN	70
300.16 Serum Copeptin Level as a Predictor of One-Year Mortality After Acute Decompensated Heart Failure Hospitalization	66
Transcatheter Aortic Valve in Failing Mechanical Aortic Valve	65
Transcatheter Heart Valves Devices for Native Aortic Valve Regurgitation	64
100.40 CTO-PCI in Patients With and Without Diabetes Mellitus: Insights From a University Hospital in Argentina	64
Advantages and Limitations of Retro- and Prospective Comparative TAVR Studies	64
Long-Term Prognosis of Coronary Aneurysms	62
TAVR and COVID-19	62
Tricuspid Regurgitation and Pulmonary Hypertension	62
Safety and Feasibility of Distal Radial Balloon Aortic Valvuloplasty	60
Management of Fluid Overload in Patients With Severe Aortic Stenosis (EASE-TAVR)	59
400.2 Factors Related with Concordance and Discordance Between Quantitative Flow Ratio and Myocardial Perfusion Scintigraphy	59
Call to ACTION	58
Bail-Out Emergency Treatment of Left Atrial Perforation After Appendage Occlusion Using Percutaneous Vascular Plug Device	58
300.08 Effects of Ultrasound-Based Renal Denervation on Weight Gain and Waist Circumference	58
Upper Extremity Superficial Venous Access in Ultrasound-Assisted Thrombolysis for Acute Pulmonary Embolism	58
Editorial Board	57
Tailoring TAVR System Design to Patient Characteristics and Needs	56
Full Issue PDF	56
Atrial Fibrillation Post-PFO Closure	55
Comparison of Patients Undergoing Percutaneous Coronary Intervention in Contemporary U.S. Practice With ISCHEMIA Trial Population	55
Systematic Proximal Optimization Technique During Bifurcation Stenting	54
Retrograde Chronic Total Occlusion Percutaneous Coronary Interventions	54
Commissural Alignment After Balloon-Expandable Transcatheter Aortic Valve Replacement Is Associated With Improved Hemodynamic Outcomes	52
Head-to-Head Comparison of 2 Paclitaxel-Coated Balloons for Femoropopliteal Lesions	52
Technical Aspects for Transcatheter Aortic Valve Replacement With the Novel Balloon-Expandable Myval Octacor	52
Prognostic Implications of Quantitative Flow Ratio and Plaque Characteristics in Intravascular Ultrasound–Guided Treatment Strategy	52
Tricuspid Valve Morphology and Outcome in Patients Undergoing Transcatheter Tricuspid Valve Edge-to-Edge Repair	52
Transcatheter Tricuspid Valve Replacement With the Cardiovalve System	51
Cardiac Resynchronization Therapy Complicated by an Indirect Annuloplasty Device Blocking Targeted Side Branch	51
A Floating Coil	51
Right Ventricular–Pulmonary Arterial Coupling	50
Drug-Coated Balloons for Percutaneous Coronary Intervention	50
Balloon-Expandable Valve for Treatment of Self-Expanding Supra-Annular Valve Failure	50
Contrast-Induced Encephalopathy After Diagnostic Coronary Angiography	50
Transcatheter Aortic Valve Replacement in Patients With Bicuspid Aortic Stenosis	49
Mismatch Between Residual Mitral Regurgitation and Left Atrial Pressure Predicts Prognosis After Transcatheter Edge-to-Edge Repair	48
Contemporary Trends and Outcomes of Intravascular Lithotripsy in Percutaneous Coronary Intervention	48
A Word of Caution Regarding Postdilatation of Self-Expanding Valves for Paravalvular Leak	48
Curtain Up for LAMPOON in Transcatheter Mitral Valve Replacement!	48
Reply	48
Reply	48
Should CFR Be Routinely Measured in the Cath Lab?	47
Sex-Specific Care After Primary Angioplasty	47
Neo-Commissural Alignment During Transcatheter Aortic Valve Replacement	47

Rotational Atherectomy, Lithotripsy, or Laser for Calcified Coronary Stenosis	46
Radial Wall Strain in the Assessment of Non-Flow-Limiting Unstable Plaques in MINOCA	46
Long-Term Outcomes of Patients Requiring Pacemaker Implantation After Transcatheter Aortic Valve Replacement	45
Early Risk of Major Adverse Limb Events Following Lower Extremity Revascularization in the VOYAGER-PAD Trial	45
Sex-Specific Differences in Upstream Cardiac Damage in Patients With Aortic Stenosis Undergoing TAVR	44
Effectiveness of Pre-TAVR CTA as a Screening Tool for Significant CAD Before TAVR	44
Artificial Intelligence–Based Fully Automated Quantitative Coronary Angiography vs Optical Coherence Tomography–Guided PCI	43
Rationale, Definitions, Techniques, and Outcomes of Commissural Alignment in TAVR	43
Improved 3-Year Cardiac Survival After IVUS–Guided Long DES Implantation	43
Predictors and Clinical Impact of Prosthesis-Patient Mismatch After Self-Expandable TAVR in Small Annuli	42
700.38 Transcatheter Edge-to-Edge Repair for Atrial Functional Mitral Regurgitation: An Updated Meta-Analysis	42
Impact of Right Ventricular Dysfunction on Symptomatic Outcomes After Transcatheter Mitral Valve Repair	42
Atrial Septostomy for Left Ventricular Unloading During Extracorporeal Membrane Oxygenation for Cardiogenic Shock	42
400.01 Impact of the Use of Plaque Modification Techniques on Coronary Microcirculation Using an Angiography-Derived Index of Microcirculatory Resistance	41
Universal Mastery in Valve Disease Treatment	41
800.57 Impact of Left and Right Heart Involvement in Patients with Primary Mitral Regurgitation Undergoing Transcatheter Edge-to-Edge Repair	41
800.6 Impact of Hospital Procedural Volume on the Outcomes of Transcatheter End-to-End Mitral Valve Repair in Clinical Trials Non-Eligible Patients	40
700.50 Predictors and Outcomes of TAVR vs. SAVR In Patients Aged 65-80: A National Inpatient Analysis	40
400.02 Aggressive Hydration Versus Standard Hydration to Prevent Contrast-Associated Nephropathy After Coronary Angiography, Meta-Analysis	40
400.08 Impact of Coronary Artery Calcification on the Accuracy of CT-FFR	40
300.18 Intravascular Lithotripsy for the Treatment of Large-Vessel Artery Calcification: Results From Our Initial Experience With the Shockwave L6 Catheter	40
800.06 Transcarotid vs. Transaxillary/Subclavian Transcatheter Aortic Valve Replacement (TAVR): A Meta-Analysis	40
Lifetime Management of Aortic Stenosis	40
100.77 Efficacy of Intracoronary Versus Peripheral Venous Administration of Glycoprotein IIb/IIIa Inhibitors in Acute Coronary Syndrome Patients: A Meta-Analysis	39
100.19 Prospective, Multicenter, Observational Registry of Safety and Effectiveness of the Ultimaster TANSEI Stent in Patients With Complex Coronary Lesions. The EPIC08 TANSEI Complex Study	39
Reply	38
900.04 CT Angiography-derived Measurements For Manta Bailout in Large-Bore Femoral Access	38
Retaining Race in Predicting AKI After Coronary Intervention	38
200.15 Twenty Four Week Safety and Efficacy of a Novel Extravascular Renal Denervation Device in a Porcine Model at an Elevated Temperature Setting	38
Trends, Predictors, and Outcomes of Bleeding Complications After Mitral Transcatheter Edge-to-Edge Repair	38
CHIP Score	38
Fibrotic vs Calcific Aortic Stenosis	37
Reply	37
Improving the Patient Relevance and Generalizability of TAVR Core Data Elements	37
Measured or Predicted Patient-Prosthesis Mismatch Following Aortic Valve Replacement	36
Taming a Rogue Watchman	36
Percutaneous Coronary Interventions Using Calcium Modification and Intravascular Imaging	36
Reply	36
Percutaneous Endovascular Repair Using Endomyocardial Bioptome for Femoral Artery Dissection After Transcatheter Aortic Valve Replacement	36
Considering All Indicators of Clinical Outcome in Patients Undergoing TAVR	36
Reply	36
CRT-100.79 AutocathFFR Versus Invasive FFR Physiology Indices	35
CRT-200.04 In-Hospital Cardiovascular Outcomes of Coagulation Disorders on Covid-19 Hospitalization: A Nationwide Analysis	35
CRT-300.14 Patients’ Tolerance for Risks Associated With Interventional or Pharmaceutical Hypertension Treatment: Results From a Discrete Choice Experiment Study	35
CRT-100.42 Markedly Elevated High-Sensitivity Troponin and In-Hospital Mortality After Cardiac Surgery	35
CRT-100.14 Development and Validation of a Nomogram for Predicting Thirty-Day Survival Among Patients in a Coronary Care Unit: A Retrospective Cohort Study	34
CRT-500.09 Representation of Women on Writing Committees and Task Forces in International Arrhythmia-Related Guidelines	34
CRT-700.23 Short- and Medium-Term Mortality in ESRD Patients Undergoing MitraClip Therapy – a Multicenter Retrospective Cohort Study	34
CRT-700.51 Taking the Lead(less) on Infective Endocarditis	34
CRT-400.06 Prevalence, Clinical Course and Etiology of Viral Myocarditis in the COVID-19 Era	34
CRT-500.15 Functional Restoration of Laminar Flow Prevented Late In-Stent Restenosis Better Than Anatomical Coronary Cosmetic Reconstruction: An Angiographic, Artificial Intelligence, and Machine Lear	34
CRT-400.15 Computed Tomography Fractional Flow Reserve Discrepancies With Invasive Angiography and Physiology	34
CRT-100.71 Early Platelet Inhibition Test After PCI – One-Year Follow-Up	34
CRT-400.08 Impact of Baseline Imaging of Non-Culprit Coronary Lesions and Adverse Events: Insight From LRP Study	34
CRT-100.23 Factors Associated With Myocardial Infarction in Intensive Care Unit Patients Presenting With Chest Pain	34
CRT-700.73 Impact of Body Mass Index (BMI) on Peri-Procedural Outcomes of Transcatheter Edge to Edge Mitral Valve Repair (TEER), Insights From a National Database	34
Subject Index	33
Periprocedural Outcomes in TAVR	33
Title Page	33
Full Issue PDF	33
Association of Residual Ischemic Disease With Clinical Outcomes After Percutaneous Coronary Intervention	32
Novel Telescope Anchoring Technique for Closure of Gigantic Coronary Fistulae Using 3-Dimensional Printing for Planning	32
Cardiogenic Shock	32
Alcohol Septal Ablation for Worsening Heart Failure After Transcatheter Aortic Valve Replacement With Self-Expandable Valve	32
The Tool Is Only as Good as the Person Who Wields It	32
Mitral Valve Transcatheter Edge-to-Edge Repair	32
Outcomes of Transcatheter Edge-to-Edge Repair, Surgical and Medical Therapy in Combined Mitral and Tricuspid Regurgitation	32
Combined Pressure and Flow Measurements to Guide Treatment of Coronary Stenoses	32
Outcomes From the EXPLANT-TAVR Registry	32
CRT-700.47 Commissural/Coronary Alignment With the Novel Myval Octacor THV - The Octa Align Technique	31
Anticoagulation After Transcatheter Aortic Valve Replacement	31
Anticoagulation and Subclinical Valve Thrombosis After TAVR	31
Minimizing Neocommissural Overlap With Coronary Ostia During TAVR in Bicuspid Versus Tricuspid Aortic Stenosis	31
Device Approval in the United States	31
Editorial Board	30
Full Issue PDF	30
The PERFORMANCE II Trial	30
Triple Aortic Valve Intervention, Ready for Prime Time?	30
Optimizing Coronary Interventional Procedure Outcomes	30
“Diamond Capture” Technique for Degenerative Mitral Regurgitation With Large Flail Gap Using the PASCAL System	30

Reply	30
Gelatin Powder Solution Seals Aortic Root Perforation During Complex Percutaneous Coronary Intervention	30
Beyond CFR	29
Positive Nuclear Stress Test After STEMI	29
A Novel Transcatheter Heart Valve for an Overcrowded TAVR Market	29
TAVR-Related Cerebrovascular Events	29
Real-World Examination of Revascularization Strategies for Left Main Coronary Disease in Ontario, Canada	29
Simplified Pacing-Over-the-Wire Technique to Streamline TAVR With Sentinel Cerebral Protection Device	28
International Psychological Well-Being Survey of Interventional Cardiologists	28
Percutaneous Transseptal Drainage of a Peri-Aortic Abscess Complicating Aortic Bioprosthetic Valve Infective Endocarditis	28
Extracorporeal Cardiopulmonary Resuscitation for Refractory Out-of-Hospital Cardiac Arrest	28
Carlino-Like Technique for Retrograde Recanalization of Chronic Thromboembolic Pulmonary Artery Occlusion	28
Risk Assessment of Coronary Artery Obstruction Following Valve-in-Valve TAVR Using Dual IVUS Ostial Evaluation Technique	27
QFR for the Revascularization of Nonculprit Vessels in MI Patients	27
Left Main Spontaneous Coronary Artery Dissection	27
Same-Day Discharge Post–Transcatheter Aortic Valve Replacement During the COVID-19 Pandemic	27
Optical Coherence Tomography Fractional Flow Reserve and Cardiovascular Outcomes in Patients With Acute Coronary Syndrome	27
Sizing Considerations of the ACURATE Transcatheter Heart Valve Platform	27
Does Pacing Affect Lifetime Pace?	27
The Association Between Angiographically Derived Radial Wall Strain and the Risk of Acute Myocardial Infarction	27
Comparison of Doppler Flow Velocity and Thermodilution Derived Indexes of Coronary Physiology	26
Dynamic Coronary Roadmap in Percutaneous Coronary Intervention	26
Intravascular Lithotripsy-Facilitated Balloon Valvuloplasty for Severely Calcified Mitral Valve Stenosis	26
Outcomes of Patients With Hypertrophic Obstructive Cardiomyopathy and Pacemaker Implanted After Alcohol Septal Ablation	26
Commissural Alignment and Transcatheter Aortic Valve Performance	26
Carotid Intraplaque Hemorrhage	25
Late Percutaneous Closure of the Right Sinus of Valsalva Fistula After Transcatheter Aortic Valve Replacement	25
Transcatheter Pulmonary Valve Replacement With “Kissing” Coronary Intervention for Coronary Compression in High-Risk Patient	25
Editorial Board	25
Transcatheter Versus Surgical Management of Paravalvular Leak	25
Implications of Moderate Aortic Stenosis	25
100.19 Restrictive Versus Liberal Blood Transfusion in Patients With Myocardial Infarction and Anemia: A Meta-Analysis of Randomized Clinical Trials	25
Sirolimus-Coated Balloon in an All-Comer Population of Coronary Artery Disease Patients	25
The Results From the COMALIGN Study	25
Plus Anchor Valve Replacement for Treatment of Severe Aortic Regurgitation With an Extremely Large Annulus	25
Discordance Between the Index of Microcirculatory Resistance and Coronary Flow Reserve After Percutaneous Coronary Intervention	25
Preventing Strokes in Anticoagulated Patients With Breakthrough Events	24
Risk of “Future” Coronary Obstruction	24
Valve Performance Between Latest-Generation Balloon-Expandable and Self-Expandable Transcatheter Heart Valves in a Small Aortic Annulus	24
Improved Commissural Alignment in TAVR With the Newest Evolut FX Self-Expanding Supra-Annular Valve	23
Prognostic Value of Tricuspid Valve Gradient After Transcatheter Edge-to-Edge Repair	23
Distal Target Vessel Quality and Outcomes of Chronic Total Occlusion Percutaneous Coronary Intervention	23
A Randomized Comparison of 2 Different Drug-Coated Balloons for In-Stent Restenosis	23
Plaque Progression Secondary to Intraplaque Hemorrhage Associated With Coronary Vasospasm	23
Simplified Interventional Treatment of Distal Wire–Related Perforation	22
Hemodynamic Profiling After Mitral Transcatheter Edge-to-Edge Repair	22
The Ratio Fallacy of Prosthesis–Patient Mismatch	22
An Aspirin-Free Strategy for Immediate Treatment Following Complex Percutaneous Coronary Intervention	22
A Strategy to Facilitate Crossing of Bicuspid Aortic Valve for Balloon Aortic Valvuloplasty and TAVR	22
Reply	22
Training Interventional Cardiologists	22
Cardiac Magnetic Resonance to Predict Coronary Artery Compression in Transcatheter Pulmonary Valve Implantation Into Conduits	22
Optimizing Carotid Care	22
Influence of Diffuse Disease on PCI Optimization	21
A Novel Method of Assessing Commissural Alignment for the SAPIEN 3 Transcatheter Aortic Valve	21
Low-Flow, Low-Gradient Severe Aortic Stenosis	21
The Trans-Stent FFR Gradient	21
One Image Gives the Answer	21
Editorial Board	21
The Art of the Seal	21
FFR-Guided PCI Optimization Directed by High-Definition IVUS	21
Constellation of Stroke, Pulmonary Embolism, and Platypnea Orthodeoxia Syndrome	20
Reply	20
Inside This Issue	20
CRT-100.83 Traditional Versus Distal Radial Access for Coronary Angiography: A Meta-Analysis of Randomized Controlled Trials	20
In Search of Cardiogenic Shock Equity, Equality, and Justice…	20
Culprit Lesions Phenotypes in ST-Segment Elevation Acute Coronary Syndromes	20
CRT-100.02 On-Pump and Off-Pump Coronary Artery Bypass Grafting on 10-Year Mortality Versus Percutaneous Coronary Intervention	20
Proximal Optimization Technique Facilitates Wire Entry Into Stumpless Chronic Total Occlusion of Side Branch	20
Drug-Coated Balloons in Small Vessels	20
Ventricular Remodeling and Outcomes After Mitral Transcatheter Edge-to-Edge Repair in Heart Failure	20
CRT-100.31 Effect of Baseline TIMI Thrombus Grade on Safety and Performance Outcomes in High Thrombus Burden Acute Coronary Syndrome Patients Treated With Sustained Mechanical Aspiration Thrombectomy	20
CRT-100.8 Are There Coronary Plaque Characteristics Associated With Late Lumen Loss? Artificial Intelligence-Based Optical Coherence Tomography (OCT) Study From the First-in-Human Trial on DREAMS 3G S	20
CRT-600.13 Insurance and Race Disparities in Cardiac Catheterization in Breast Cancer: Machine Learning and Propensity Score Analysis of Procedure, Mortality, and Cost Nationally and by Region	19
CRT-100.32 The Relationship Between Trimethylamine N-Oxide and Coronary Collateral Circulation in Patients With ST-Segment Elevation Myocardial Infarction	19
CRT-100.83 Coronary Angiographic Patterns of Drug-Eluting In-Stent Restenosis	19
CRT-300.22 Randomized Controlled Trial of Mechanical Thrombectomy Versus Anticoagulation Alone for Deep Vein Thrombosis: The DEFIANCE Study Design and Rationale	19
CRT-700.16 Outcomes of Transcatheter Aortic Valve Replacement in Patients With and Without Amyloidosis: A Nationwide Analysis From the United States	19
CRT-100.98 Sirolimus-Eluting Balloon With a Micro-Reservoir-Based Technology for the Treatment of De Novo Coronary Lesions – Subgroup Analysis of a Prospective, Multi-Center, Pivotal Single-Arm Trial	19
CRT-100.91 Impact of Coronary Artery Spasm on Long-Term Clinical Outcomes for Patients With Chest Pain Without Diabetes Mellitus in Korean Population	19
CRT-400.13 Early Vascular Healing of Combo Stents in Patients With Acute Myocardial Infarction	19
CRT-100.44 Revascularization Strategy in Cardiogenic Shock and Acute Myocardial Infarction: A Systematic Review and Meta-Regression Analysis	19
CRT-100.74 Peri-Procedural Complications, Early and Mid-term Outcomes of Percutaneous Coronary Intervention in Patients With Cancer	19
CRT-100.45 Long-Term Prognosis Following Myocardial Infarction With Nonobstructive Coronary Artery Disease: A Seven-Year Longitudinal Follow-Up	19
Ediorial Board	18
Transcatheter Antegrade Electrosurgical Laceration of Mitral Valve Chordae Followed by Transcatheter Edge-to-Edge Repair	18
CRT-700.59 Infective Endocarditis: Local Antibiotic Treatment, a Future Option for Transcatheter Valve Replacement?	18
Novel Large-Diameter Controlled-Expansion Stentriever, Embolic-Prevention Stent and Flow Reversal in Large-Thrombus-Burden ICA Proximal Occlusion Stroke	18
Deformation of Aortic Root Configuration After Surgical Aortic Valve Replacement	18
CRT-500.11 The Length of the Right Coronary Artery Decided Where a Lesion Is Located: A Dynamic Angiographic Coronary Flow and Machine Learning Analysis	18
Embracing Invasive Physiologic Assessment in STEMI	18
A Journey of Innovation in Mitral Transcatheter Edge-to-Edge Repair	18
Transcatheter Pulmonary Valve Implantation	18
300.25 Lack of Obesity Paradox Regarding Mortality in Patients Undergoing Extracorporeal Membrane Oxygenation Treatment	17
900.01 Percutaneous Endovascular Management of Mantarelated Vascular Occlusion	17