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Cardiovascular Diseases

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Articles 121 - 131 of 131

Full-Text Articles in Cardiology

Is Dynamic Atrial Overdrive Pacing Anti-Arrhythmic Or Proarrhythmic: A Case Report, Ngai-Yin Chan, Miu-Fong Kwok, Chi-Chung Choy Oct 2002

Is Dynamic Atrial Overdrive Pacing Anti-Arrhythmic Or Proarrhythmic: A Case Report, Ngai-Yin Chan, Miu-Fong Kwok, Chi-Chung Choy

Journal of the Hong Kong College of Cardiology

No abstract provided.

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Drug Eluting Stent: A Major Advance In Fighting Coronary Artery Restenosis, Yuk-Kong Lau Oct 2002

Drug Eluting Stent: A Major Advance In Fighting Coronary Artery Restenosis, Yuk-Kong Lau

Journal of the Hong Kong College of Cardiology

Since the first use of coronary angioplasty in 1977, there have been major growth and development in percutaneous coronary intervention (PCI). Due to the advances in techniques, experiences, devices, and newer potent antiplatelet and antithrombotic medications, PCI is increasingly performed in highly complex and high risk patients with a reasonably low complication rate. Coupled with reduced discomfort, shorter hospital stay and recovery time, it has far outnumbered the volume of coronary artery bypass surgery. Currently, 1.7 million PCI procedures are performed annually worldwide with increases by 15-20% per year the last decade.

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The Post-Madit Ii Era: Icd For All Post-Infarct Patients With Moderate To Severe Left Ventricular Dysfunction?, Kathy Lai-Fun Lee, Chu-Pak Lau Jul 2002

The Post-Madit Ii Era: Icd For All Post-Infarct Patients With Moderate To Severe Left Ventricular Dysfunction?, Kathy Lai-Fun Lee, Chu-Pak Lau

Journal of the Hong Kong College of Cardiology

Device therapy has become the preferred treatment for patients who have survived sudden cardiac death. Throughout the last decade, large-scale randomized clinical trials have provided consistent evidence on the clinical efficacy of device therapy. ICD is proven to be superior to anti-arrhythmic drugs in patients with structural heart diseases who suffer from haemodynamically significant ventricular arrhythmias. The role of ICD in primary prevention of sudden death in selected patients with coronary artery disease and left ventricular dysfunction is also widely established after the Multicenter Automatic Defibrillator Implant Trial (MADIT) and the Multicenter Unsustained Tachycardia Trial (MUSTT).

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Role Of Signal-Averaged Ecg In Predicting Results Of Flecainide Provocation Test Used In Family Screening For Brugada Syndrome, Ngai-Shing Mok, Chi-Chung Choy, Ngai-Yin Chan, Amy Ho Jul 2002

Role Of Signal-Averaged Ecg In Predicting Results Of Flecainide Provocation Test Used In Family Screening For Brugada Syndrome, Ngai-Shing Mok, Chi-Chung Choy, Ngai-Yin Chan, Amy Ho

Journal of the Hong Kong College of Cardiology

Brugada syndrome (BS) is an inherited arrhythmogenic disease with an autosomal dominant mode of inheritance. Flecainide provocation test (FPT) has been shown to be highly sensitive and specific in unmasking the Brugada ECG pattern in affected subjects. We sought to test if late potential (LP) in signal averaged electrocardiogram (SAECG) is helpful in predicting the results of FPT used in family screening for BS. The study included 17 asymptomatic Chinese subjects from 8 families (M:F 10:7, mean age 24.8±11.4 years) who have undergone family screening for BS. All screened subjects had a normal 12-lead ECG at baseline. None had structural …

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Percutaneous Revascularisation In Diabetic Patients With Coronary Artery Disease, Wai-Hong Chen, Chu-Pak Lau Jul 2002

Percutaneous Revascularisation In Diabetic Patients With Coronary Artery Disease, Wai-Hong Chen, Chu-Pak Lau

Journal of the Hong Kong College of Cardiology

Diabetic patients with coronary artery disease are associated with an unfavourable long-term outcome. Surgical revascularisation on top of medical therapy has been shown to confer survival benefit in patients with mutivessel and left main disease. With the emergence of the percutaneous approach of revascularisation, several clinical trials have been conducted to compare these two modalities of treatment. Consistent results were demonstrated in the diabetic subgroup that coronary artery bypass grafting is superior to balloon angioplasty in preventing late adverse cardiac event. With the advancement of percutaneous technique using coronary stenting as the predominant mode of catheter based revascularisation, the latest …

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The Long-Term Clinical Prognosis In Patients With Anterior Wall And Non-Anterior Wall Acute Myocardial Infarction Referred To Primary Percutaneous Transluminal Coronary Angioplasty, Mingzhong Zhao, Dayi Hu, Tianchang Li, Sanqing Jia Jan 2002

The Long-Term Clinical Prognosis In Patients With Anterior Wall And Non-Anterior Wall Acute Myocardial Infarction Referred To Primary Percutaneous Transluminal Coronary Angioplasty, Mingzhong Zhao, Dayi Hu, Tianchang Li, Sanqing Jia

Journal of the Hong Kong College of Cardiology

Objective: To investigate the long-term clinical prognosis in patients with anterior wall acute myocardial infarction (AW-AMI) and non AW-AMI (NAW-AMI) referred to primary percutaneous transluminal coronary angioplasty (P-PTCA). Methods: 287 patients with AMI who underwent P-PTCA were divided into AW-AMI group (142 cases) and NAW AMI group (145 cases) according to different sites of AMI. The baseline characteristics and coronary artery lesions of patients were analysed. The primary end points were in-hospital mortality and the major cardiovascular events (MACE) during a mean 17.3±9.8 months follow-up including the occurrences of non-fatal myocardial infarction, non-fatal congestive heart failure, revascularization of target vessels …

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Appropriate Use Of Clopidogrel, Cyrus R Kumana, Bernard Man-Yung Cheung, Ij Lauder Jan 2002

Appropriate Use Of Clopidogrel, Cyrus R Kumana, Bernard Man-Yung Cheung, Ij Lauder

Journal of the Hong Kong College of Cardiology

Clopidogrel (Plavix®) is an orally administered pro-drug, whose pharmacology and therapeutic role has been extensively reviewed in recent publications.1-5 In essence, it results in selective and irreversible antagonism of ADP-induced platelet aggregation. Such aggregation normally results in the surface expression of platelet glycoprotein (GP) IIb/IIIa receptors, which facilitate fibrinogen binding as well as consequential further platelet aggregation – the final common pathway of vascular occlusion. Specific cytochrome P450 enzymes are thought to generate the responsible active metabolite (believed to persist transiently). However, dosage adjustment is not recommended in hepatic impairment (unless severe) and drug-drug interactions and co-administration with meals are …

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Mapping And Ablation Of Complex Cardiac Arrhythmia Guided By A Novel Three Dimensional Non-Contact Endocardial Activation Mapping System, Wing-Hong Fung, Chi-Kin Chan, Kam-Sang Woo, Wilson Wai-Man Chan Oct 2001

Mapping And Ablation Of Complex Cardiac Arrhythmia Guided By A Novel Three Dimensional Non-Contact Endocardial Activation Mapping System, Wing-Hong Fung, Chi-Kin Chan, Kam-Sang Woo, Wilson Wai-Man Chan

Journal of the Hong Kong College of Cardiology

Conventional cardiac activation mapping requires a sequentially-based method of positioning a catheter in contact with the endocardium to generate intracardiac electrograms at single points during sustained arrhythmia. Significant limitation of such point by point mapping may be encountered when applying to complex arrhythmia e.g. non-sustained arrhythmia or haemodynamically unstable arrhythmia. A novel non-contact mapping system (Ensite 3000 system) providing a three-dimensional simultaneous display of arrhythmia activation may offer a solution. The non-contact mapping system consists of a specially designed balloon catheter (Ensite EP catheter) with 64 insulated wires over the surface of the balloon for sensing electrical potentials on the …

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The Use Of Wallstent And Smart Stents Incarotid Stent-Supported Angioplasty, Steven Siu-Lung Li Oct 2001

The Use Of Wallstent And Smart Stents Incarotid Stent-Supported Angioplasty, Steven Siu-Lung Li

Journal of the Hong Kong College of Cardiology

In the endovascular approach of carotid stenosis treatment, stent-supported angioplasty is current state-of-the-art technique. Self-expandable stents are preferable to balloon-expandable stents due to the potential risk of deformation of the latter by external pressure. Wallstents and SMART stents are the more commonly used self-expandable stents. They appear to be of similar efficacy and safety but due to their different characteristics, their applications may be different according to different lesion characteristics.

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Arrhythmogenic Right Ventricular Cardiomyopathy, Wing-Hong Fung, Chi-Kin Chan, John E. Sanderson Jul 2001

Arrhythmogenic Right Ventricular Cardiomyopathy, Wing-Hong Fung, Chi-Kin Chan, John E. Sanderson

Journal of the Hong Kong College of Cardiology

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a familial form of cardiomyopathy predominantly affecting the right ventricle but may progress to involve the left ventricle as well. At the late stage of the disease, it is sometimes difficult to differentiate with other forms of dilated cardiomyopathy. In most affected families, the mode of inheritance of the disease is autosomal dominant. Lately, the gene accounting for the autosomal recessive form of ARVC, which was associated with palmoplantar keratosis, was identified. ARVC can present with sudden cardiac death without any preceding symptoms in the young population. Therefore, ARVC must be included in the …

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Brachytherapy In The New Millennium Abstracts, Jilin Chen, Runlin Gao, Qiangjun Cai, Yuejin Yang Oct 2000

Brachytherapy In The New Millennium Abstracts, Jilin Chen, Runlin Gao, Qiangjun Cai, Yuejin Yang

Journal of the Hong Kong College of Cardiology

In order to examine long-term efficacy of percutaneous transluminal coronary angioplasty (PTCA), coronary stenting and to assess the factors affecting its efficacy, 790 patients who underwent successful PTCA and PTCS+Stent in this Hospital were followed by direct interview or letter.

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