Publications
181 results found
Nijjer SS, van de Hoef T, da Cunha RP, et al., 2014, RESTING CORONARY BLOOD FLOW VELOCITY IS CONSTANT ACROSS ALL STENOSIS SEVERITIES: IMPLICATIONS FOR TANDEM LESION AND PULLBACK ASSESSMENT, JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, Vol: 63, Pages: A1610-A1610, ISSN: 0735-1097
da Cunha RP, van de Hoef T, Nijjer S, et al., 2014, PROGNOSTIC INSIGHTS INTO THE UTILISATION OF INSTANTANEOUS WAVE-FREE RATIO (IFR) TO GUIDE CORONARY REVASCULARISATION: RESULTS OF THE JUSTIFY-CFR STUDY, A COMPARISON OF PRESSURE-ONLY INDICES AGAINST CORONARY FLOW RESERVE, JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, Vol: 63, Pages: A1507-A1507, ISSN: 0735-1097
Foin N, Gutierrez-Chico JL, Nakatani S, et al., 2014, Incomplete Stent Apposition Causes High Shear Flow Disturbances and Delay in Neointimal Coverage as a Function of Strut to Wall Detachment Distance Implications for the Management of Incomplete Stent Apposition, CIRCULATION-CARDIOVASCULAR INTERVENTIONS, Vol: 7, Pages: 180-189, ISSN: 1941-7640
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- Citations: 156
Nijjer S, Petraco R, Sen S, et al., 2014, The change in coronary flow after percutaneous coronary intervention in physiologically defined coronary stenoses, LANCET, Vol: 383, Pages: 76-76, ISSN: 0140-6736
Nijjer SS, Sohaib SMA, Whinnett ZI, et al., 2014, Management of supraventricular tachycardias, BRITISH JOURNAL OF HOSPITAL MEDICINE, Vol: 75, Pages: C26-C28, ISSN: 1750-8460
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- Citations: 2
Petraco R, Escaned J, Nijjer S, et al., 2014, Fractional Flow Reserve: A Good or a Gold Standard? Reply, JACC-CARDIOVASCULAR INTERVENTIONS, Vol: 7, Pages: 228-229, ISSN: 1936-8798
Echavarria-Pinto M, Gonzalo N, Ibanez B, et al., 2014, Low Coronary Microcirculatory Resistance Associated With Profound Hypotension During Intravenous Adenosine Infusion Implications for the Functional Assessment of Coronary Stenoses, CIRCULATION-CARDIOVASCULAR INTERVENTIONS, Vol: 7, Pages: 35-42, ISSN: 1941-7640
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- Citations: 23
Nijjer SS, Sohaib SMA, Hinnett ZI, et al., 2014, Diagnosis of supraventricular tachycardias, BRITISH JOURNAL OF HOSPITAL MEDICINE, Vol: 75, Pages: C22-C25, ISSN: 1750-8460
Tarkin JM, Nijjer S, Sen S, et al., 2014, Hemodynamic Response to Intravenous Adenosine and Its Effect on Fractional Flow Reserve Assessment Results of the Adenosine for the Functional Evaluation of Coronary Stenosis Severity (AFFECTS) Study, CELL BIOLOGY INTERNATIONAL, Vol: 38, Pages: 654-661, ISSN: 1065-6995
Tarkin JM, Nijjer S, Sen S, et al., 2013, Hemodynamic Response to Intravenous Adenosine and Its Effect on Fractional Flow Reserve Assessment Results of the Adenosine for the Functional Evaluation of Coronary Stenosis Severity (AFFECTS) Study, CIRCULATION-CARDIOVASCULAR INTERVENTIONS, Vol: 6, Pages: 654-661, ISSN: 1941-7640
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- Citations: 47
Foin N, Mattesini A, Ghione M, et al., 2013, Tools & Techniques Clinical: Optimising stenting strategy in bifurcation lesions with insights from <i>in vitro</i> bifurcation models, EUROINTERVENTION, Vol: 9, Pages: 885-887, ISSN: 1774-024X
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- Citations: 16
Kousera CA, Nijjer SS, Torii R, et al., 2013, Patient-specific Coronary Stenoses Can Be Modeled Using a Combination of Optical Coherence Tomography and Flow Velocities to Accurately Predict Hyperaemic Pressure Gradients, 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B186-B186, ISSN: 0735-1097
Foin N, Alegria E, Torii R, et al., 2013, Location of Side Branch Access Critically Affects Results in Bifurcation Stenting: Insights From In-vitro Modeling and Optical Coherence Tomography, 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B180-B181, ISSN: 0735-1097
Nijjer SS, van de Hoef TP, Petraco R, et al., 2013, Mean Hyperemic Flow is Not Increased Following Adenosine Administration in Physiologically Significant Lesions, 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B188-B188, ISSN: 0735-1097
Petraco R, van de Hoef TP, Nijjer SS, et al., 2013, Identification of stenoses with high underlying coronary flow reserve from pressure-only measurements using baseline instant wave-free ratio (iFR) and hyperaemic fractional flow reserve (FFR), 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B190-B190, ISSN: 0735-1097
Kousera CA, Nijjer SS, Torii R, et al., 2013, Optical Coherence Tomography can be combined with angiography to create highly accurate patient-specific models of human coronary anatomy in a rapid automated manner, 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B195-B195, ISSN: 0735-1097
van de Hoef TP, Petraco R, van Lavieren MA, et al., 2013, Diagnostic accuracy of basal stenosis resistance index (BSR) is higher than that of instantaneous wave-free ratio (iFR): validation of basal stenosis resistance index in an independent cohort of simultaneous pressure and flow measurements, 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B193-B193, ISSN: 0735-1097
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- Citations: 1
Echavarria-Pinto M, Nijjer SS, Sen S, et al., 2013, Low coronary microcirculatory resistance associated to profound hypotension during intravenous adenosine infusion. Implications for the functional assessment of coronary stenoses., 25th Annual Symposium on Transcatheter Cardiovascular Therapeutics (TCT), Publisher: ELSEVIER SCIENCE INC, Pages: B191-B191, ISSN: 0735-1097
Nijjer S, Petraco R, Sen S, et al., 2013, RESOLVE could not verify the VERIFY study. Re: Improvement in coronary haemodynamics after percutaneous coronary intervention: assessment using instantaneous wave-free ratio. Nijjer, et al. 99:23 1740-1748 doi:10.1136/heartjnl-2013-304387, Heart
'The first step of scientific progress is both accepted knowledge and continual, instantaneous willingness to admit that what we believed true earlier was wrong and needing replacement...' Lance Gould [1]We thank Fan, Qi, He, Yang and Pijls for their continued interest in our work and physiology as a whole. Science thrives on experiments repeatable in independent hands. Dogma, on the other hand, discourages independent thought and when results are unexpected, an enormous scientific hiatus follows. Leaders unwilling to change, may feel obliged to further entrench into cherished concepts but this only makes the inevitable paradigm shift more unpleasant.Yang et al correctly point out the importance of RESOLVE[2], an international collaboration that was necessary to resolve important questions raised by the VERIFY study[3]. Although the final results of RESOLVE were to conclude that in independent hands the findings were similar to results by the ADVISE investigators [46], perhaps the most important message may have been missed. VERIFY, when reanalysed independently using the validated iFR algorithms, was not as originally presented and the findings of Berry et al. could not be substantiated. Now VERIFY, hailed as the death knell of iFR, stands alone, conflicting with every other iFRFFR study in the field.[7] How could this have occurred?It is now evident that in a fervour of excitement, serious oversights and amnesiac errors seem to have arisen.First, the VERIFY authors paid little attention to the accuracy of their iFR wavefree period and instead chose to define diastole as including a part of systole (clearly visible in Figure 1 of the VERIFY manuscript[3]). Whilst superficially appearing to be only a minor physiological transgression, the fundamental principles of iFR state that resistance is only stable and minimised over the cardiac cycle where waves are absent i.e. the wavefree period[4].Second, unique patient numbers appear oversta
Foin N, Torii R, Alegria E, et al., 2013, Location of side branch access critically affects results in bifurcation stenting: Insights from bench modeling and computational flow simulation, INTERNATIONAL JOURNAL OF CARDIOLOGY, Vol: 168, Pages: 3623-3628, ISSN: 0167-5273
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- Citations: 47
Petraco R, Escaned J, Sen S, et al., 2013, How high can "accuracy" be for iFR (or IVUS, or SPECT or OCT...) if using fractional flow reserve as the gold standard? RESPONSE, EUROINTERVENTION, Vol: 9, Pages: 770-772, ISSN: 1774-024X
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- Citations: 2
Nijjer SS, Sen S, Petraco R, et al., 2013, Improvement in coronary haemodynamics after percutaneous coronary intervention: assessment using instantaneous wave-free ratio., Heart, Vol: 99, Pages: 1740-1748
To determine whether the instantaneous wave-free ratio (iFR) can detect improvement in stenosis significance after percutaneous coronary intervention (PCI) and compare this with fractional flow reserve (FFR) and whole cycle Pd/Pa.
Foin N, Sen S, Petraco R, et al., 2013, Method for Percutaneously Introducing, and Removing, Anatomical Stenosis of Predetermined Severity In Vivo: The "Stenotic Stent", JOURNAL OF CARDIOVASCULAR TRANSLATIONAL RESEARCH, Vol: 6, Pages: 640-648, ISSN: 1937-5387
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- Citations: 3
Tarkin J, Nijjer S, Sen S, et al., 2013, The haemodynamic response to intravenous adenosine and its impact on fractional flow reserve: results of the AFFECTS (Adenosine For the Functional assEssment of Coronary sTenosis Severity) study, Congress of the European-Society-of-Cardiology (ESC), Publisher: OXFORD UNIV PRESS, Pages: 514-514, ISSN: 0195-668X
Sabharwal S, Patel V, Nijjer SS, et al., 2013, Guidelines in cardiac clinical practice: evaluation of their methodological quality using the AGREE II instrument, JOURNAL OF THE ROYAL SOCIETY OF MEDICINE, Vol: 106, Pages: 315-322, ISSN: 0141-0768
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- Citations: 33
Nijjer SSS, Sen S, Petraco R, et al., 2013, INSTANTANEOUS WAVE-FREE RATIO (IFR) CAN DETECT IMPROVEMENT IN CORONARY STENOSIS SEVERITY AFTER PERCUTANEOUS INTERVENTION, Annual Conference of the British-Cardiovascular-Society (BCS), Publisher: BMJ PUBLISHING GROUP, Pages: A37-A37, ISSN: 1355-6037
Sen S, Nijjer SS, Petraco R, et al., 2013, THE TRANS-STENOTIC PRESSURE GRADIENT DURING THE DIASTOLIC WAVE-FREE PERIOD IS PROPORTIONAL TO FLOW: THE PHYSIOLOGICAL BASIS OF THE INSTANT-WAVE-FREE RATIO, Annual Conference of the British-Cardiovascular-Society (BCS), Publisher: BMJ PUBLISHING GROUP, ISSN: 1355-6037
Sen S, Nijjer SS, Petraco R, et al., 2013, FRACTIONAL FLOW RESERVE AND THE INSTANT WAVE-FREE RATIO HAVE EQUIVALENT AGREEMENT WITH FLOW BASED INDICES ACROSS THE ENTIRE SPECTRUM OF STENOSIS SEVERITY RESULTS OF THE CLARIFY STUDY RESULTS OF CLARIFY, Annual Conference of the British-Cardiovascular-Society (BCS), Publisher: BMJ PUBLISHING GROUP, Pages: A35-A35, ISSN: 1355-6037
Nijjer SS, Eshtehardi P, Corban MT, et al., 2013, RELIABILITY OF RESTING CORONARY HAEMODYNAMICS WHEN REPEATED AFTER 6 MONTHS, Annual Conference of the British-Cardiovascular-Society (BCS), Publisher: BMJ PUBLISHING GROUP, ISSN: 1355-6037
Petraco R, Sen S, Nijjer SS, et al., 2013, FFR-GUIDED CORONARY REVASCULARISATION: IMPLICATIONS OF ITS BIOLOGICAL VARIABILITY ON CLINICAL DECISIONS, Annual Conference of the British-Cardiovascular-Society (BCS), Publisher: BMJ PUBLISHING GROUP, ISSN: 1355-6037
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