Publications by authors named "Timothy C Dy"

5 Publications

  • Page 1 of 1

Sex differences in patients undergoing transcatheter aortic valve replacement in Asia.

Open Heart 2021 01;8(1)

Department of Cardiology, Sichuan University West China Hospital, Chengdu, China.

Objectives: Transcatheter aortic valve replacement (TAVR) is increasingly performed. Physically small Asians have smaller aortic root and peripheral vessel anatomy. The influence of gender of Asian patients undergoing TAVR is unknown and may affect outcomes. The aim of this study was to assess sex differences in Asian patients undergoing TAVR.

Methods: Patients undergoing TAVR from eight countries were enrolled. In this retrospective analysis, we examined differences in characteristics, 30-day clinical outcomes and 1-year survival between female and male Asian patients.

Results: Eight hundred and seventy-three patients (54.4% women) were included. Women were older, smaller and had less coronary artery and lung disease but tended to have higher logistic EuroSCOREs. Smaller prostheses were used more often in women. Major vascular complications occurred more frequently in women (5.5% vs 1.8%, p<0.01); however, 30-day stroke and mortality (women vs men: 1.5% vs 1.6%, p=0.95% and 4.3% vs 3.4%, p=0.48) were similar. Functional status improvement was significant and comparable between the sexes. Conduction disturbance and permanent pacemaker requirements (11.2% vs 9.0%, p=0.52) were also similar as was 1-year survival (women vs men: 85.6% vs 88.2%, p=0.25). The only predictors of 30-day mortality were major vascular injury in women and age in men.

Conclusions: Asian women had significantly smaller stature and anatomy with some differences in clinical profiles. Despite more frequent major vascular complications, women had similar 30-day stroke or mortality rates. Functional status improvement was significant and comparable between the sexes. Conduction disturbance and permanent pacemaker requirements were similar as was 1-year survival.
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January 2021

Asia-Pacific Consensus Statement on the Management of Peripheral Artery Disease: A Report from the Asian Pacific Society of Atherosclerosis and Vascular Disease Asia-Pacific Peripheral Artery Disease Consensus Statement Project Committee.

J Atheroscler Thromb 2020 Aug 4;27(8):809-907. Epub 2020 Jul 4.

Department of Clinical Epidemiology, University of the Philippines College of Medicine.

Background: Peripheral artery disease (PAD) is the most underdiagnosed, underestimated and undertreated of the atherosclerotic vascular diseases despite its poor prognosis. There may be racial or contextual differences in the Asia-Pacific region as to epidemiology, availability of diagnostic and therapeutic modalities, and even patient treatment response. The Asian Pacific Society of Atherosclerosis and Vascular Diseases (APSAVD) thus coordinated the development of an Asia-Pacific Consensus Statement (APCS) on the Management of PAD.

Objectives: The APSAVD aimed to accomplish the following: 1) determine the applicability of the 2016 AHA/ACC guidelines on the Management of Patients with Lower Extremity Peripheral Artery Disease to the Asia-Pacific region; 2) review Asia-Pacific literature; and 3) increase the awareness of PAD.

Methodology: A Steering Committee was organized to oversee development of the APCS, appoint a Technical Working Group (TWG) and Consensus Panel (CP). The TWG appraised the relevance of the 2016 AHA/ACC PAD Guideline and proposed recommendations which were reviewed by the CP using a modified Delphi technique.

Results: A total of 91 recommendations were generated covering history and physical examination, diagnosis, and treatment of PAD-3 new recommendations, 31 adaptations and 57 adopted statements. This Asia-Pacific Consensus Statement on the Management of PAD constitutes the first for the Asia-Pacific Region. It is intended for use by health practitioners involved in preventing, diagnosing and treating patients with PAD and ultimately the patients and their families themselves.
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August 2020

Predictors of Permanent Pacemaker Insertion Following Transcatheter Aortic Valve Replacement With the CoreValve Revalving System Based on Computed Tomography Analysis: An Asian Multicenter Registry Study.

J Invasive Cardiol 2015 Jul;27(7):334-40

Department of Cardiology, University of Ulsan College of Medicine, Cardiac Center, Asan Medical Center, 388-1 Poongnap-dong, Songpa-gu, Seoul, 138-736 Korea.

Background: To determine predictive variables for permanent pacemaker (PPM) insertion after transcatheter aortic valve replacement (TAVR) with the CoreValve Revalving System (CRS).

Methods And Results: A total of 121 patients with severe aortic stenosis (AS) were recruited from six Asian medical centers between March 2010 and May 2013. Four patients with preexisting PPM were excluded. The mean age of the remaining 117 patients was 81.2 ± 5.1 years. Twenty-three patients (19.7%) required post-TAVR PPM, with a median time-to-insertion of 7 days (interquartile range, 5-13 days). Two variables were identified as independent predictors of PPM: (1) device depth from the non-coronary cusp (NCC) (odds ratio [OR], 1.263; P=.02) determined by aortic root angiography; and (2) the perimeter stretching index (OR, 1.584; P<.001) determined by computed tomography. The predictive cut-off values were as follows: a perimeter stretching index >1.13 (P<.001) and a device depth from the NCC >7.8 mm (P<.001). The diagnostic accuracy of these variables was 93.2% and 71%, respectively.

Conclusion: Depth of the device from the NCC and the perimeter stretching index are independent predictors of PPM insertion after CRS-TAVR.
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July 2015

Angioplasty of an asymptomatic total occlusion of the left subclavian artery to provide access for coronary angiography and intervention: a case report.

Catheter Cardiovasc Interv 2004 Mar;61(3):310-3

Section of Interventional Cardiology, Division of Invasive, Diagnostic and Therapeutic Cardiology, Philippine Heart Center, Quezon City, Philippines.

Reports and follow-up of angioplasty and stenting of asymptomatic totally occluded subclavian arteries are limited. We present a case of unstable angina and arterial occlusion of all four extremities treated with subclavian angioplasty and stenting with subsequent coronary angiography and percutaneous coronary intervention. Twelve-month follow-up is also provided.
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March 2004