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Start Over Author "Yu, Cheuk-Man" Journal journal of the american college of cardiology
47 results on '"Yu, Cheuk-Man"'

6. CHRONIC KIDNEY DISEASE IN ASIAN PATIENTS WITH HEART FAILURE

Author

Tromp, Jasper, primary, Teng, Katherine T.H., additional, Tay, Wan Ting, additional, Anand, Inder, additional, Zhang, Shu, additional, Shimizu, Wataru, additional, Narasimhan, Calambur, additional, Park, S.W., additional, Yu, Cheuk-Man, additional, Ngarmukos, Tachapong, additional, Omar, Razali, additional, Reyes, Eugene B., additional, Hung, Chung-Lieh, additional, Ling, Lieng, additional, Yap, Jonathan, additional, MacDonald, Michael Ross, additional, Richards, Mark, additional, and Lam, Carolyn, additional

Published
2017
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9. GW25-e4151 Timing selection of delayed percutaneous coronary intervention in ST-segment elevation of myocardial infarction

Author

Jing Liu, Sun Jian, Zhao Dong, Yu Cheuk Man, and Zheng Wen

Subjects
medicine.medical_specialty, business.industry, medicine.medical_treatment, Percutaneous coronary intervention, medicine.disease, Clinical Practice, surgical procedures, operative, Internal medicine, Conventional PCI, Cardiology, Medicine, ST segment, cardiovascular diseases, Myocardial infarction, Cardiology and Cardiovascular Medicine, business, Selection (genetic algorithm)
Abstract

At present, a considerable portion of STEMI patients who missed early reperfusion received delayed percutaneous coronary intervention (PCI). However, timing selection of delayed PCI differs in clinical practice and is less well-established. So the present study described the current situation on

Published
2014

12. Ticagrelor Effects on Myocardial Infarction and the Impact of Event Adjudication in the PLATO (Platelet Inhibition and Patient Outcomes) Trial

Author

Mahaffey, Kenneth W., primary, Held, Claes, additional, Wojdyla, Daniel M., additional, James, Stefan K., additional, Katus, Hugo A., additional, Husted, Steen, additional, Steg, Philippe Gabriel, additional, Cannon, Christopher P., additional, Becker, Richard C., additional, Storey, Robert F., additional, Khurmi, Nardev S., additional, Nicolau, José C., additional, Yu, Cheuk-Man, additional, Ardissino, Diego, additional, Budaj, Andrzej, additional, Morais, Joao, additional, Montgomery, Debra, additional, Himmelmann, Anders, additional, Harrington, Robert A., additional, and Wallentin, Lars, additional

Published
2014
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26. Reply

Author

Yu, Cheuk-Man, primary, Sanderson, John E., additional, Marwick, Thomas H., additional, and Oh, Jae K., additional

Published
2007
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28. Cardiac Resynchronization Therapy

Author

Bax, Jeroen J., primary, Abraham, Theodore, additional, Barold, S. Serge, additional, Breithardt, Ole A., additional, Fung, Jeffrey W.H., additional, Garrigue, Stephane, additional, Gorcsan, John, additional, Hayes, David L., additional, Kass, David A., additional, Knuuti, Juhani, additional, Leclercq, Christophe, additional, Linde, Cecilia, additional, Mark, Daniel B., additional, Monaghan, Mark J., additional, Nihoyannopoulos, Petros, additional, Schalij, Martin J., additional, Stellbrink, Christophe, additional, and Yu, Cheuk-Man, additional

Published
2005
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38. Cardiac Resynchronization Therapy Part 2—Issues During and After Device Implantation and Unresolved Questions

Author

Bax, Jeroen J., Abraham, Theodore, Barold, S. Serge, Breithardt, Ole A., Fung, Jeffrey W.H., Garrigue, Stephane, Gorcsan, John, Hayes, David L., Kass, David A., Knuuti, Juhani, Leclercq, Christophe, Linde, Cecilia, Mark, Daniel B., Monaghan, Mark J., Nihoyannopoulos, Petros, Schalij, Martin J., Stellbrink, Christophe, and Yu, Cheuk-Man

Subjects
genetic structures, cardiovascular system, cardiovascular diseases, equipment and supplies, circulatory and respiratory physiology
Abstract

Encouraged by the clinical success of cardiac resynchronization therapy (CRT), the implantation rate has increased exponentially, although several limitations and unresolved issues of CRT have been identified. This review concerns issues that are encountered during implantation of CRT devices, including the role of electroanatomical mapping, whether CRT implantation should be accompanied by simultaneous atrioventricular nodal ablation in patients with atrial fibrillation, procedural complications, and when to consider surgical left ventricular lead positioning. Furthermore, (echocardiographic) CRT optimization and assessment of CRT benefits after implantation are highlighted. Also, controversial issues such as the potential value of CRT in patients with mild heart failure or narrow QRS complex are addressed. Finally, open questions concerning when to combine CRT with implantable cardioverter-defibrillator therapy and the cost-effectiveness of CRT are discussed.

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39. Cardiac Resynchronization Therapy Part 1—Issues Before Device Implantation

Author

Bax, Jeroen J., Abraham, Theodore, Barold, S. Serge, Breithardt, Ole A., Fung, Jeffrey W.H., Garrigue, Stephane, Gorcsan, John, Hayes, David L., Kass, David A., Knuuti, Juhani, Leclercq, Christophe, Linde, Cecilia, Mark, Daniel B., Monaghan, Mark J., Nihoyannopoulos, Petros, Schalij, Martin J., Stellbrink, Christophe, and Yu, Cheuk-Man

Subjects
cardiovascular system, cardiovascular diseases
Abstract

Cardiac resynchronization therapy (CRT) has been used extensively over the last years in the therapeutic management of patients with end-stage heart failure. Data from 4,017 patients have been published in eight large, randomized trials on CRT. Improvement in clinical end points (symptoms, exercise capacity, quality of life) and echocardiographic end points (systolic function, left ventricular size, mitral regurgitation) have been reported after CRT, with a reduction in hospitalizations for decompensated heart failure and an improvement in survival. However, individual results vary, and 20% to 30% of patients do not respond to CRT. At present, the selection criteria include severe heart failure (New York Heart Association functional class III or IV), left ventricular ejection fraction 120 ms). Assessment of inter- and particularly intraventricular dyssynchrony as provided by echocardiography (predominantly tissue Doppler imaging techniques) may allow improved identification of potential responders to CRT. In this review a summary of the clinical and echocardiographic results of the large, randomized trials is provided, followed by an extensive overview on the currently available echocardiographic techniques for assessment of LV dyssynchrony. In addition, the value of LV scar tissue and venous anatomy for the selection of potential candidates for CRT are discussed.

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40. Tissue Doppler Imaging A New Prognosticator for Cardiovascular Diseases

Author

Yu, Cheuk-Man, Sanderson, John E., Marwick, Thomas H., and Oh, Jae K.

Subjects
cardiovascular system, cardiovascular diseases
Abstract

Tissue Doppler imaging (TDI) is evolving as a useful echocardiographic tool for quantitative assessment of left ventricular (LV) systolic and diastolic function. Recent studies have explored the prognostic role of TDI-derived parameters in major cardiac diseases, such as heart failure, acute myocardial infarction, and hypertension. In these conditions, myocardial mitral annular or basal segmental (Sm) systolic and early diastolic (Ea or Em) velocities have been shown to predict mortality or cardiovascular events. In particular, those with reduced Sm or Em values of

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41. Strain Rate Imaging Differentiates Transmural From Non-Transmural Myocardial Infarction A Validation Study Using Delayed-Enhancement Magnetic Resonance Imaging

Author

Zhang, Yan, Chan, Anna K.Y., Yu, Cheuk-Man, Yip, Gabriel W.K., Fung, Jeffrey W.H., Lam, Wynnie W.M., So, Nina M.C., Wang, Mei, Wu, Eugene B., Wong, John T., and Sanderson, John E.

Subjects
parasitic diseases, cardiovascular system, cardiovascular diseases
Abstract

ObjectivesThe aim of this study was to determine if strain rate imaging (SRI) correlates with the transmural extent of myocardial infarction (MI) measured by contrast-enhanced magnetic resonance imaging (Ce-MRI).BackgroundIdentification of the transmural extent of myocardial necrosis and degree of non-viability after acute MI is clinically important.MethodsTissue Doppler echocardiography with SRI and Ce-MRI were performed in 47 consecutive patients with a first acute MI between days 2 and 6 and compared to 60 age-matched healthy volunteers. Peak myocardial velocities and peak myocardial deformation strain rates were measured. Location and size of the infarct zone was confirmed by Ce-MRI using the delayed enhancement technique with a 16-segment model.ResultsContrast-enhanced MRI identified transmural infarction in 21 patients, non-transmural infarction in 15 (mean transmurality of infarct 72.3 ± 10.6%), and another 11 patients with subendocardial infarction (−0.59 s−1detected a transmural infarction with high sensitivity (90.9%) and high specificity (96.4%), and −0.98 s−1>SRs >−1.26 s−1distinguished subendocardial infarction from normal myocardium with a sensitivity of 81.3% and a specificity of 83.3%.ConclusionsPeak myocardial deformation by SRI can differentiate transmural from non-transmural MI, and it allows noninvasive determination of transmurality of the scar after MI and thereby the extent of non-viable myocardium.

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42. Diastolic and Systolic Asynchrony in Patients With Diastolic Heart Failure A Common But Ignored Condition

Author

Yu, Cheuk-Man, Zhang, Qing, Yip, Gabriel W.K., Lee, Pui-Wai, Kum, Leo C.C., Lam, Yat-Yin, and Fung, Jeffrey Wing-Hong

Abstract

ObjectivesThe present study aimed to examine whether diastolic and systolic asynchrony exist in diastolic heart failure (DHF) and their prevalence and relationship to systolic heart failure (SHF) patients.BackgroundFew data exist on mechanical asynchrony in DHF.MethodsTissue Doppler echocardiography was performed in 373 heart failure patients (281 with SHF and 92 with DHF) and 100 normal subjects. Diastolic and systolic asynchrony was determined by measuring the standard deviation of time to peak myocardial systolic (Ts-SD) and peak early diastolic (Te-SD) velocity using a 6-basal, 6-mid-segmental model, respectively.ResultsBoth heart failure groups had prolonged Te-SD (DHF vs. SHF vs. controls subjects: 32.2 ± 18.0 ms vs. 38.0 ± 25.2 ms vs. 19.5 ± 7.1 ms) and Ts-SD (31.8 ± 17.0 ms vs. 36.7 ± 15.2 ms vs. 17.6 ± 7.9 ms) compared with the control group (all p < 0.001 vs. control subjects). Based on normal values, the DHF group had comparable diastolic (35.9% vs. 43.1%; chi-square = 1.48, p = NS), but less systolic asynchrony than the SHF group (39.1% vs. 56.9%; chi-square = 8.82, p = 0.003). Normal synchrony, isolated systolic, isolated diastolic, and combined asynchrony were observed in 39.1%, 25.0%, 21.7%, and 14.1% of DHF patients, respectively, and these were 25.6%, 31.3%, 17.4%, and 25.6%, correspondingly, in SHF (chi-square = 10.01, p = 0.019). The correlation between systolic and diastolic asynchrony, and between the myocardial velocities and corresponding mechanical asynchrony appeared weak. A wide QRS duration (>120 ms) was rare in DHF (10.9% vs. 37.7% in SHF) (chi-square = 16.69, p < 0.001).ConclusionsDiastolic and/or systolic asynchrony was common in 61% of DHF patients despite narrow QRS complex. The presence of asynchrony was not related to myocardial systolic or diastolic function. Systolic and diastolic asynchrony were not tightly coupled, implying distinct mechanisms.

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46. Cardiac resynchronization therapy: Part 1--issues before device implantation.

Author

Bax JJ, Abraham T, Barold SS, Breithardt OA, Fung JW, Garrigue S, Gorcsan J 3rd, Hayes DL, Kass DA, Knuuti J, Leclercq C, Linde C, Mark DB, Monaghan MJ, Nihoyannopoulos P, Schalij MJ, Stellbrink C, and Yu CM

Subjects
Cardiac Output, Low diagnostic imaging, Cardiac Output, Low physiopathology, Cardiac Output, Low surgery, Cardiac Pacing, Artificial, Echocardiography, Humans, Pacemaker, Artificial, Patient Selection, Randomized Controlled Trials as Topic, Cardiac Output, Low therapy
Abstract

Cardiac resynchronization therapy (CRT) has been used extensively over the last years in the therapeutic management of patients with end-stage heart failure. Data from 4,017 patients have been published in eight large, randomized trials on CRT. Improvement in clinical end points (symptoms, exercise capacity, quality of life) and echocardiographic end points (systolic function, left ventricular size, mitral regurgitation) have been reported after CRT, with a reduction in hospitalizations for decompensated heart failure and an improvement in survival. However, individual results vary, and 20% to 30% of patients do not respond to CRT. At present, the selection criteria include severe heart failure (New York Heart Association functional class III or IV), left ventricular ejection fraction <35%, and wide QRS complex (>120 ms). Assessment of inter- and particularly intraventricular dyssynchrony as provided by echocardiography (predominantly tissue Doppler imaging techniques) may allow improved identification of potential responders to CRT. In this review a summary of the clinical and echocardiographic results of the large, randomized trials is provided, followed by an extensive overview on the currently available echocardiographic techniques for assessment of LV dyssynchrony. In addition, the value of LV scar tissue and venous anatomy for the selection of potential candidates for CRT are discussed.

Published
2005
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47. Cardiac resynchronization therapy: Part 2--issues during and after device implantation and unresolved questions.

Author

Bax JJ, Abraham T, Barold SS, Breithardt OA, Fung JW, Garrigue S, Gorcsan J 3rd, Hayes DL, Kass DA, Knuuti J, Leclercq C, Linde C, Mark DB, Monaghan MJ, Nihoyannopoulos P, Schalij MJ, Stellbrink C, and Yu CM

Subjects
Atrial Fibrillation complications, Atrial Fibrillation therapy, Atrioventricular Node, Cardiac Output, Low complications, Cardiac Output, Low diagnostic imaging, Cardiac Output, Low physiopathology, Echocardiography, Electric Countershock, Humans, Intraoperative Care, Intraoperative Complications, Postoperative Care, Treatment Outcome, Cardiac Output, Low therapy, Cardiac Pacing, Artificial, Pacemaker, Artificial
Abstract

Encouraged by the clinical success of cardiac resynchronization therapy (CRT), the implantation rate has increased exponentially, although several limitations and unresolved issues of CRT have been identified. This review concerns issues that are encountered during implantation of CRT devices, including the role of electroanatomical mapping, whether CRT implantation should be accompanied by simultaneous atrioventricular nodal ablation in patients with atrial fibrillation, procedural complications, and when to consider surgical left ventricular lead positioning. Furthermore, (echocardiographic) CRT optimization and assessment of CRT benefits after implantation are highlighted. Also, controversial issues such as the potential value of CRT in patients with mild heart failure or narrow QRS complex are addressed. Finally, open questions concerning when to combine CRT with implantable cardioverter-defibrillator therapy and the cost-effectiveness of CRT are discussed.

Published
2005
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