Pak Hong Wong

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Two patients undergoing stent placement with the Palmaz-Schatz coronary stent delivery system experienced intracoronary stent embolization. Using a two-wire technique, the stents were successfully removed from the coronary circulation, and this allowed completion of the percutaneous revascularization procedure without any clinical sequelae. These two cases(More)
Recurrence of persistence of heart failure in patients after mitral and aortic valve replacement is a difficult diagnostic problem. Clinical evaluation and noninvasive tests cannot always distinguish poor left ventricular function from paraprosthetic leak or persistent pulmonary vascular disease. Full evaluation by cardiac catheterisation may then be(More)
Ten patients with Chronic Obstructive Airway Disease (COAD) and five subjects with duodenal ulcers and normal lung function were given 50 mg ranitidine as a single intravenous bolus injection. Hemodynamic responses were continuously monitored. There were no significant alterations in systemic and pulmonary pressures, systemic and total pulmonary vascular(More)
The AVE Micro coronary stent is a balloon-expandable stent with a design that is different from the commonly used slotted tubular or coil stents. The stent delivery system is low in profile and very trackable so that it can negotiate tortuous vessels to reach distal lesions. It also can pass through proximally deployed stents easily. Its moderate(More)
The Multi-Link coronary stent (Advanced Cardiovascular Systems, Santa Clara, CA) is a balloon expandable stent carved from a stainless steel cylinder and is composed of 12 corrugated rings connected by multiple links. This design gives the stent great flexibility and conformity as well as radial strength. For the 3 month period from November 1995 to January(More)
OBJECTIVE To examine the utility of intracardiac echocardiography in guiding complex transseptal catheterization of patients undergoing percutaneous transvenous mitral commissurotomy. DESIGN We assessed this procedure in high-risk patients in whom transseptal catheterization is technically complex and more demanding. MATERIAL AND METHODS Fifteen(More)
We describe the implantation of a stent graft to seal off the left main coronary artery aneurysm of a 64-year-old man with guidance by intravascular ultrasound. The aneurysm was successfully sealed off. At 6-month and 1-year follow-up, a small residual aneurysm reappeared, which was treated conservatively. The technical issues in closing this aneurysm and(More)
The involvement of Ca++ ions as secretory mediators in pig jejunal epithelia has been investigated with an in vitro system. Omission of Ca++ from the Ringer-HCO3 bathing media on both sides of the tissue had minor effects on the basal electrical activity of pig jejunal mucosa. There were only slight decreases in transepithelial potential difference and(More)
Between January 1991 and December 1992, 136 Palmaz-Schatz coronary stents were implanted in 113 native coronary arteries in 106 patients. Forty-seven patients presented with stable angina, 50 with unstable angina, 7 with congestive cardiac failure and unstable angina and 2 were asymptomatic. Stenting was carried out in 15 patients for restenosis after(More)