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K S Cha

Publications and source records attributed to K S Cha.

12 recordsLinked to original sources
PubMed2001

Retrieval of dislodged and disfigured transradially delivered coronary stent: report on a case using forcep and antegrade brachial sheath insertion.

We report a case of dislodged and damaged stent during transradial coronary procedure using 6 Fr device, which was successfully retrieved by using a forcep and 8 Fr antegrade brachial sheath. The disfigured and bulky stent can be removed, after their retrieval from the coronary circulation, using a forcep inserted through an 8 Fr brachial artery sheath if the radial artery is deemed too small to accommodate larger sheath.

Brachial Artery↗
PubMed2001

Combined right transradial coronary angiography and selective carotid angiography: safety and feasibility in unselected patients.

We evaluated the safety and feasibility of ad hoc carotid angiography following the right transradial coronary angiography. Selective carotid angiography was performed subsequent to coronary angiography in 213 consecutive patients. A 5 Fr Simmons catheter was reformed in descending or ascending aorta, then, withdrawn and rotated to cannulate the left and right carotid artery. Both carotid angiography was performed selectively in 211 (99%) patients. In two patients with severely tortuous subclavian artery, selective cannulation of the left carotid artery failed. There was no thromboembolism or arterial dissection. After the learning phase of 50 patients, the time to reform the catheter in aorta and to cannulate the left and right carotid artery was 50 +/- 77, 66 +/- 68, and 58 +/- 57 sec, respectively. Total procedural time was 195 +/- 145 sec. In conclusion, ad hoc carotid angiography can be performed reliably and safely following the right transradial coronary angiography. It might be useful for evaluation of an isolated or associated carotid artery stenosis. Cathet Cardiovasc Intervent 2001;53:380-385.

Adolescent↗
PubMed2001

Bilateral selective internal mammary artery angiography via right radial approach: clinical experience with newly designed Yumiko catheter.

The radial artery has been increasingly used as a primary access site for coronary angiography and intervention. But the technique for internal mammary artery (IMA) visualization via the right radial artery has not been well described. Therefore, the study was conducted to investigate the feasibility, safety, and adequacy of selective bilateral IMA angiography via the right radial artery using the recently developed Yumiko catheter. From November 1999 to October 2000, both IMA angiographies were undertaken immediately following the diagnostic coronary angiogram taken from right transradial approach in 114 patients. IMA angiography was successfully obtained in 99% (113/114) patients. For left IMA angiography, 73 (64%), 28 (25%), and 12 (11%) imagings were obtained in a selective, a semiselective, and a nonselective way, respectively. After initial periods of 33 left-IMA-only imaging, right IMA angiography was obtained in 81 patients (phase 2). Selective right IMA imaging was done in 73 (90%), semiselective in 6, and nonselective in 2 patients. The reasons for failure of selective or semiselective visualization were severe vascular tortuosity, far distal anatomical origin of left IMA and ulcerative plaque, or acutely angled left subclavian artery. The feasibility and safety of selective and semiselective bilateral IMA angiography were demonstrated using a 5 Fr Yumiko catheter from the right radial approach. Cathet Cardiovasc Intervent 2001;54:19-24.

Adult↗
PubMed2001

Nonselective left internal mammary artery angiography during right transradial coronary angiography: a simple, rapid, and safe technique.

Internal mammary artery angiography is increasingly required, but the technique for left internal mammary artery (LIMA) angiography during right transradial coronary angiography is not well established. The authors investigated the feasibility and safety of a new, simple, and rapid nonselective technique. Following right transradial coronary angiography, LIMA angiography was performed using a 5 French (Fr) Judkins JL-3.5 catheter in 110 patients. The catheter, placed in the ascending aorta with its natural curve, was withdrawn slowly while being rotated clockwise to engage its tip in the proximal left subclavian artery. Contrast material was injected while sphygmomanometer cuff inflation was applied to the left upper arm. In the last 50 patients, the angiography was performed twice randomly with and without the cuff inflation. In 108 patients (98%), the catheter was successfully engaged in the subclavian artery in a mean of 11 +/- 8 seconds (range, 3-136) from the time when it was withdrawn from the ascending aorta, and nonselective LIMA angiography was successfully performed. The image quality of the angiograms was satisfactory in 103 (95%) of the 108 patients. In the last 50 patients, the image quality of the angiograms was determined satisfactory in 48 (96%) and 45 (90%) patients, with and without the cuff inflation, respectively. The difference was statistically not significant. There were no complications, including arterial dissection and thromboembolism. In conclusion, nonselective LIMA angiography can be readily and safely performed during right transradial coronary angiography using a 5 Fr Judkins JL-3.5 catheter.

Aged↗
PubMed2000

Primary stenting for acute myocardial infarction via the transradial approach: a safe and useful alternative to the transfemoral approach.

BACKGROUND: Primary stenting in acute myocardial infarction (AMI) has been demonstrated to reduce recurrent ischemic events. However, transradial stenting in AMI has not been well established. Therefore, we sought to investigate the feasibility and utility of transradial coronary stenting in patients with AMI. METHODS: From April 1998 to April 1999, 56 patients (43 male; mean age of 57 years) who arrived within 6 hours of pain onset with culprit vessel size > 2.5 mm constituted this study. The transradial approach (Group 1) was used in 30 patients with hemodynamically stable and palpable right radial pulse. The transfemoral approach (Group 2) was used for vascular access in the remainder of patients (26) who might have required a second vascular access site for intraaortic balloon pumping (in cardiogenic shock) and/or a transvenous temporary pacemaker. RESULTS: Overall success rate was achieved in 54 of 56 patients (96%). The success rate was 90% (27/30) in Group 1 and 96% (25/26) in Group 2. The cannulation time (from patient arrival at the catheterization room to the time of arterial cannulation) and the total procedure time (from patient arrival at the catheterization room to the completion of the procedure) were not significantly different between Group 1 and Group 2 (9.2+/-5.3 versus 8.9+/-5. 8 minutes, p>0.05; 53.7+/-19.4 versus 57.5 +/-26.8 minutes, p>0.05, respectively). In the Group 1 patients, there was no forearm ischemia or loss of radial pulse during the 30-day follow-up period. CONCLUSION: Primary coronary stenting for acute myocardial infarction via the transradial approach is a safe and feasible alternative to the conventional transfemoral approach, and is especially useful for hemodynamically stable patients who do not require a second vascular access site.

Adult↗
PubMed1998

Determination of free acetaldehyde in total blood for investigating the effect of aspartate on metabolism of alcohol in mice.

To explore the effect of sodium L-aspartate monohydrate (aspartate) as a NAD+ regenerating agent for acetaldehyde in alcohol metabolism, a simple HPLC method has been developed for the measurement of free acetaldehyde in total mice blood digested with alcohol and aspartate. The blood samples were collected in EDTA Vacutainer tubes, and treated with 2,4-dinitrophenylhydrazine (DNP hydrazine) reagent in total blood. Acetaldehyde DNP hydrazone was extracted from total blood and analyzed by HPLC using an Ultrasphere ODS column. The compounds were separated using acetonitrile-water (50:50, v/v) as mobile phase and detected at 356 nm. The detection limit for acetaldehyde DNP hydrazone was 0.1 ppm. A blank determination was carried out for each analysis and subtracted from the results. The amount of acetaldehyde in blood has been determined as a function of time lapse after sole alcohol administration and aspartate ingestion followed by alcohol administration, respectively. This comparative analysis demonstrates that the ingestion of aspartate before the administration of alcohol dramatically decreases the aldehyde level in blood, and aspartate may be utilized as a prospective antagonist for acceleration of ethanol metabolism and prevention of acetaldehyde toxicity.

Acetaldehyde↗
PubMed1997

Atrial fibrillation in patients with permanent VVI pacemakers: risk factors for atrial fibrillation.

OBJECTIVES: Atrial fibrillation (AF) does not only deteriorate the cardiac function and increases the thromboembolic risk but also triggers rapid and irregular ventricular rhythm in patients with atrial synchronous pacing. However, the risk factors for the development of AF in patients with pacemakers are not clearly determined yet. The present study was designed to determine the risk factors for AF in patients with VVI pacemakers. METHODS: This study included 80 patients (41 sick sinus syndrome, 39 AV block) who were followed for more than 6 months or developed AF regardless of the duration of follow-up after implantation of VVI pacemakers. Patients were divided into two groups according to whether or not AF developed during follow-up (mean: 25.7 +/- 2.5 months): group A developed AF and group B did not. The underlying arrhythmias, cardiovascular risk factors, left atrial size, characteristics of P wave were compared between the two groups. RESULTS: The mean age of the patients was 58.9 +/- 11.4 years and 28 (35%) were male. AF developed in 13 (16.3%) of 80 patients with VVI pacemakers. Sick sinus syndrome (SSS) as an underlying arrhythmia was significantly more frequent in group A than group B (84.6% vs. 44.8%, p < 0.01). P wave width was greater in group A (127.6 +/- 24.8 ms) than in group B (110.7 +/- 17 ms) (p < 0.05). There was, however, no significant difference in cardiovascular risk factors, left atrial size, P wave axis and amplitude between the two groups. CONCLUSION: These results suggest that sinus node dysfunction and intra-atrial conduction delay may be the risk factors for AF in patients with VVI pacemakers. Further studies are needed to determine how sick sinus syndrome and intra-atrial conduction delay increase the risk for AF in patients with VVI pacemakers.

Adult↗
PubMed1991

An unusual venous anomaly of the placenta.

The authors present an unusual vascular anomaly of the placenta. The placenta was very large, weighing 1,490 g. On the fetal surface, numerous dilated and tortuous vessels were observed on and under the chorionic membrane, of which three branches arose from a vein that was connected to the umbilical vein. One of them had a 5 x 2.5 cm aneurysmal dilatation, where three secondary branches arose. These venous channels were dilated and tortuous. The longest secondary branch was 133 cm in length and 1.2 cm in mean diameter and led into the placenta. Multiple, severely coiled or straight small branches arising from these vessels were also observed as vascular tangles. Some of these smaller vessels also led into the placenta. All abnormal vessels were veins. The umbilical cord was also normal except for a membranous insertion, and the placenta was unremarkable except for its large size.

Adult↗
PubMed1991

Body stalk anomaly--a case report.

A case is presented of an amnionic rupture sequence which led to massive fetal ventral herniation and lordoscoliosis. Characteristic ultrasonographic findings of an omphalocele, fetal attachment to the placenta, and the absence of free-floating umbilical cord were observed.

Abnormalities, Multiple↗
PubMed1991

Interrupted circular suture: bleeding control during cesarean delivery in placenta previa accreta.

Rapid accumulation of blood from the placental separation site during cesarean delivery for placenta previa obscures the surgical field and quickly leads to deterioration of the patient's vital signs. We used the following technique in eight cases of intractable bleeding among 49 cesareans for placenta previa. Following failure to control the bleeding by suture at the placental separation site via the lower segment cesarean incision, the vessels were ligated using interrupted 2-3-cm sutures at 1-cm intervals in a circle around the bleeding area on the serosal surface of the uterus. The sutures were placed as deeply as possible in order to reach the endometrium. This led to a marked decrease in bleeding and allowed the small vessels to be easily identified and ligated. The amount of blood transfused and the operation time were gradually reduced as we became adept in the use of this procedure. Our experience suggests that this technique could reduce the use of hysterectomy in cesarean for placenta previa.

Blood Loss, Surgical↗
PubMed1990

Window operation: an alternative treatment method for Bartholin gland cysts and abscesses.

Recently, we developed the "window operation" as a more effective way to treat Bartholin gland cysts and abscesses. The window operation was used to treat 25 Bartholin cysts and 22 Bartholin abscesses during a 3-year period from October 1, 1986 to September 30, 1989. Under local anesthesia, a small piece of skin including the cyst wall was excised in an oval shape, and suturing was performed along the excised margin. Postoperative antibiotics were given in cases of acute inflammation. A new mucocutaneous junction was observed at the 4-week postoperative checkup. No complications or recurrences have been observed during the study period. The window operation can be an alternative method of treatment for Bartholin gland cysts or abscesses.

Abscess↗