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Leung TN, Cheung KL, Wong F. Congenital listeriosis: case reports and review of literature. ASIA-OCEANIA JOURNAL OF OBSTETRICS AND GYNAECOLOGY 1994; 20:173-7. [PMID: 8092963 DOI: 10.1111/j.1447-0756.1994.tb00445.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Four babies with congenital listeriosis were diagnosed in the Prince of Wales Hospital in Hong Kong in 1990-1991. Two died in the early neonatal period. The remaining 2 survived and recovered with no sequelae. The clinical and pathological features of these babies, together with those reported in the recent literature are highlighted so as to raise a high index of suspicion toward this disease and hopefully prompt treatment can be offered.
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177
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Li CK, Ng MH, Cheung KL, Lam TK, Shing MM. Interaction of hereditary spherocytosis and alpha thalassaemia: a family study. Acta Haematol 1994; 91:201-5. [PMID: 7976119 DOI: 10.1159/000204335] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report here a family of patients with coexistent hereditary spherocytosis and alpha-thalassaemia. The different clinical presentations of the family members were affected by the severity of the alpha-thalassaemia. The haemolytic effect of hereditary spherocytosis was modulated by the increased osmotic resistance of thalassaemia in the patients with both disorders. Coexistence of haemoglobin H disease and hereditary spherocytosis resulted in an asymptomatic state. In contrast, coexistence of alpha-thalassaemia trait and hereditary spherocytosis was still haemolytic. The different shapes of the osmotic curves in the family members correlated with the severity of their symptoms.
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178
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Yip AS, Chow WH, Fu KH, Cheung KL, Li JP, Lee JS. Effect of percutaneous balloon mitral valvuloplasty on serum creatinine phosphokinase MB-isoenzyme levels. CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS 1993; 29:179-82. [PMID: 8402839 DOI: 10.1002/ccd.1810290302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Twenty-one patients with moderate to severe mitral stenosis were treated with percutaneous balloon mitral valvuloplasty (PBMV) using Inoue mitral double-lumen balloon catheters. Creatinine phosphokinase MB isoenzyme (CPK-MB) levels were measured at baseline, 5 min, 6 h, and 18 h post dilatation. Haemodynamic indexes, 12-lead ECGs, and 2-dimensional echocardiograms were performed to evaluate systolic function postprocedure. CPK-MB levels were modestly increased at 5 min and at 6 h postprocedure compared with the baseline level (p < 0.001) but were still within the normal reference range, except for one patient who had a level at 5 min minimally above the upper limit of normal. CPK-MB levels were not significantly increased at 18 h after the procedure. No significant changes in ejection fractions, 12-lead ECGs, and regional wall motion occurred in any of the patients studied. In conclusion, PBMV causes modest early elevation of CPK-MB. This elevation is not associated with changes in LV systolic function and does not interfere with the diagnosis of acute myocardial infarction using the enzyme elevation criteria.
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179
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Chow WH, Chow TC, Yip AS, Cheung KL. Percutaneous balloon mitral valvotomy in patients with history of embolism. Am J Cardiol 1993; 71:1243-4. [PMID: 8480660 DOI: 10.1016/0002-9149(93)90660-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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180
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Chow WH, Chow TC, Wat MS, Cheung KL. Percutaneous mitral balloon valvotomy in a patient with coexistent mitral stenosis and hypertrophic cardiomyopathy. Clin Cardiol 1993; 16:257-9. [PMID: 8444001 DOI: 10.1002/clc.4960160318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A patient with coexistent mitral stenosis and hypertrophic cardiomyopathy is described, in whom symptoms related to impaired left ventricular diastolic filling improved after successful percutaneous mitral balloon valvotomy.
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181
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Chow WH, Chow TC, Cheung KL. Angiographic recognition of a proximal balloon tear during Inoue balloon mitral valvotomy. CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS 1993; 28:235-7. [PMID: 8440002 DOI: 10.1002/ccd.1810280310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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182
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Chow WH, Chow TC, Cheung KL. Formation of left atrial spontaneous echocardiographic contrast after surgical correction of mitral regurgitation. JOURNAL OF CLINICAL ULTRASOUND : JCU 1993; 21:209-210. [PMID: 8382226 DOI: 10.1002/jcu.1870210312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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183
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184
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Chow WH, Chow LT, Cheung KL. Resolution of spontaneous echocardiographic contrast after percutaneous balloon mitral commissurotomy. Int J Cardiol 1992; 34:209-10. [PMID: 1737672 DOI: 10.1016/0167-5273(92)90157-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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185
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Chow WH, Chow TC, Wat MS, Cheung KL. Percutaneous balloon mitral valvotomy in pregnancy using the Inoue balloon catheter. Cardiology 1992; 81:182-5. [PMID: 1286478 DOI: 10.1159/000175794] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Percutaneous balloon mitral valvotomy (PBMV) using the Inoue balloon catheter was performed successfully in 2 patients with severe mitral stenosis refractory to medical treatment during pregnancy. Because of its unique design and ease of manipulation, we recommend the Inoue balloon catheter for performing PBMV in selected patients with mitral stenosis during pregnancy, as procedure and fluoroscopy times can be significantly shortened.
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186
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Chow WH, Yip AS, Tai YT, Cheung KL. Venous thrombosis after long-term transvenous pacing in the Chinese. Angiology 1991; 42:522-6. [PMID: 1863011 DOI: 10.1177/000331979104200702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To determine the incidence of venous thrombosis after long-term transvenous pacing in the Chinese, venograms were performed in 50 consecutive Chinese patients seen at the pacemaker clinic. There were 25 women and 25 men. The mean age was sixty-six years (range thirty-two to eighty-one). The indications for pacing were complete heart block in 16 patients and sick sinus syndrome in the remainder. All pacemakers were of the single-chamber ventricular pacing type and had been implanted for a mean period of four years (range two to seven). In 27 patients the route of entry for the pacing electrode was through the cephalic vein and in the other 23 patients the subclavian veins were used. Of the 50 venograms, 1 showed partial and 1 showed total obstruction at the subclavian vein. Both patients (4%) were asymptomatic. All others (96%) were normal. The incidence of venous thrombosis was not related to the routes of entry of the pacing electrodes. All patients tolerated the procedure well and had no complications. It is concluded that the incidence of venous thrombosis after long-term transvenous pacing is extremely low in the Chinese (4%), and venograms are both safe and useful for identifying venous thrombosis related to transvenous pacing.
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187
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Chow WH, Leung WH, Tai YT, Lee WT, Cheung KL. Echocardiographic diagnosis of an aortic root abscess after Mycobacterium fortuitum prosthetic valve endocarditis. Clin Cardiol 1991; 14:273-5. [PMID: 2013186 DOI: 10.1002/clc.4960140319] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A patient with an aortic root abscess complicating Mycobacterium fortuitum prosthetic endocarditis is described. The correct diagnosis had been made preoperatively by echocardiography and was confirmed subsequently at surgery.
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188
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Abstract
Nine patients with atrial myxoma in whom selective coronary arteriography had been performed were studied. The angiographic sign of 'tumour vascularity' was found to be present in three patients with highly vascularized atrial myxoma. The clinical significance of the angiographic sign is unknown although highly vascularized myxomata appear to have a greater propensity to bleeding into the tumour, resulting in an acute worsening of clinical symptoms. The angiographic sign of 'tumour vascularity' is not specific but useful to complement the diagnosis of an atrial myxoma. The indication for selective coronary arteriography in patients with atrial myxoma remains the detection of coronary artery disease, thus concomitant coronary artery bypass surgery could be planned preoperatively.
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189
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Chow WH, Cheung KL. Pulsatile varicose veins--a sign of tricuspid regurgitation. THE BRITISH JOURNAL OF CLINICAL PRACTICE 1990; 44:669. [PMID: 2102184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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190
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Chow WH, Lee WT, Tai YT, Cheung KL. Free-floating ball thrombus in left atrium after mitral valve replacement: surgical removal following embolization to the aorta. Am Heart J 1990; 120:1463-5. [PMID: 2248198 DOI: 10.1016/0002-8703(90)90269-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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191
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Yip AS, Chow WH, Tai YT, Cheung KL. Adverse effect of topical methylsalicylate ointment on warfarin anticoagulation: an unrecognized potential hazard. Postgrad Med J 1990; 66:367-9. [PMID: 2371186 PMCID: PMC2426834 DOI: 10.1136/pgmj.66.775.367] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The adverse effect of topical methylsalicylate ointment on warfarin anticoagulation is studied in 11 patients. All patients had an abnormally elevated international normalized ratio after significant usage of topical methylsalicylate ointment as obvious from both the clinical history and a positive blood level of salicylate. Out of the 11 patients, 3 had bleeding manifestation; 2 with bruises and 1 with gastrointestinal bleeding. It is concluded that topical methylsalicylate ointment should be prescribed with care to patients on warfarin and excessive usage is to be avoided since potentially dangerous drug interaction could occur.
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192
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Chow WH, Cheung KL, Tai YT, Cheng CH. Successful percutaneous balloon valvuloplasty of a stenotic tricuspid bioprosthesis. Am Heart J 1990; 119:666-8. [PMID: 2309607 DOI: 10.1016/s0002-8703(05)80291-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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193
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Chow WH, Tai YT, Mok CK, Cheung KL. Ruptured aneurysm of the sinus of Valsalva. CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS 1990; 19:148. [PMID: 2306779 DOI: 10.1002/ccd.1810190219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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194
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Fok TF, So LY, Lee NN, Leung RK, Wong W, Cheung KL, Davies DP. Late metabolic acidosis and poor weight gain in moderately pre-term babies fed with a casein-predominant formula: a continuing need for caution. ANNALS OF TROPICAL PAEDIATRICS 1989; 9:243-7. [PMID: 2482007 DOI: 10.1080/02724936.1989.11748640] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
When our neonatal unit opened in 1984 our formula feeding policy for moderately preterm babies was for casein-predominant rather than "humanized" whey-predominant milk formulae to be given. However, an early cluster of cases of late persistent metabolic acidosis prompted an investigation into the acid-base status and weight gain in preterm infants. This study of 70 healthy, moderately preterm (32-35 weeks) Chinese babies has convincingly shown that a casein-predominant low protein formula is associated with significant metabolic acidosis, persisting sometimes for as long as 8 weeks, and poor weight gain when compared with infants fed on either a humanized or a special low-birthweight formula. This is an important message for the many neonatal units in developing countries where the cost of humanized formulae might initially seem prohibitive, encouraging instead casein-predominant formulae when breast milk is not available. Any additional expense incurred in using humanized formulae will be compensated for by the shortened time spent in hospital.
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195
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Chow WH, Tai YT, Cheung KL. False detection of left atrial thrombus by the angiographic sign of "neovascularity". CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS 1989; 18:165-7. [PMID: 2480185 DOI: 10.1002/ccd.1810180306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
"Neovascularity" in the region of the left atrial appendage was demonstrated by coronary arteriography preoperatively in five patients with mitral valve disease and was attributed to the presence of thrombus in the left atrium. Subsequently, they underwent surgery, but thorough inspection of the left atrium did not reveal thrombus in any of the five patients. The presence of neovascularity without apparent thrombosis or false detection may be a result of tissue reaction and organization in an effort to resorb the thrombus.
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196
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Abstract
A patient is reported in whom a left atrial myxoma was found to be infected with Staphylococcus aureus. The clinical presentation, diagnosis and treatment are described and discussed.
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197
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Chow WH, Lee PK, Cheung KL, Mok CK. Two-dimensional and pulsed Doppler echocardiographic diagnosis of an acquired aortic right ventricular fistula. Clin Cardiol 1989; 12:544-5. [PMID: 2791376 DOI: 10.1002/clc.4960120913] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A patient with an asymptomatic aortic right ventricular fistula acquired after aortic valve and mitral valve replacement is presented. This was diagnosed by two-dimensional and pulsed Doppler echocardiography, and confirmed at cardiac catheterization.
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198
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Lau CP, Cheung KL, Mok CK. Biventricular perforation by a temporary pacing electrode: recognition from the lateral chest radiograph. Int J Cardiol 1989; 24:368-71. [PMID: 2767815 DOI: 10.1016/0167-5273(89)90019-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A temporary pacing electrode was inserted in a patient with severe calcific aortic stenosis complicated by complete atrioventricular block. Despite normal pacing and sensing function, a diagnosis of myocardial perforation was made on the basis of a lateral chest radiograph. Neither the surface electrocardiogram nor the frontal chest radiograph suggested evidence of myocardial perforation, and echocardiographic diagnosis was limited by poor echogenicity of the patient. Biventricular perforation with pericardial effusion were documented at operation.
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199
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van Eyck J, Wladimiroff JW, Noordam MJ, Cheung KL, van den Wijngaard JA, Prechtl HF. The blood flow velocity waveform in the fetal descending aorta; its relationship to fetal heart rate pattern, eye and body movements in normal pregnancy at 27-28 weeks of gestation. Early Hum Dev 1988; 17:187-94. [PMID: 3208675 DOI: 10.1016/0378-3782(88)90007-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In 13 normal pregnancies at 27-28 weeks of gestation the blood flow velocity waveform at the lower thoracic level of the fetal descending aorta was studied in relation to fetal heart rate pattern (FHRP), fetal eye movements (FEM) and fetal body movements (FBM). State parameter combinations in which high fetal heart rate (FHR) variability was present, were associated with a significant reduction in pulsatility index (PI) as compared with periods in which low FHR variability was present, irrespective of FEM and FBM, indicating a reduced peripheral vascular resistance. At 27-28 weeks of gestation FHR variability and PI might be linked to baroreceptor sensitivity. PI values derived from combinations FHRP-A, FEM(-), FBM(-) and FHRP-B, FEM(+), FBM(+) showed a significant inverse relationship (P less than 0.05) with FHR. FHR and FHR variability should be taken into account when studying flow velocity waveforms in the fetal descending aorta at 27-28 weeks of gestation.
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200
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Lee J, Cheung KL, Wang R, Mok CK, Khin MA. Malignant fibrous histiocytoma of left atrium. J Thorac Cardiovasc Surg 1987; 94:450-2. [PMID: 3041125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A case is presented of malignant fibrous histiocytoma arising adjacent to a mitral Carpentier-Edwards bioprosthesis placed 6 years previously.
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