Original Articles Wolff-Parkinson-White 증후군의임상상및 전기생리학적소견 * Abstract 안신기 1 이문형 1 장양수 1 오동진 2 최인석 3 하종원 1 임세중 1 김병옥 4 정남식 1 심원흠 1 조승연 1 김성순 1

Similar documents


Original Articles 심실조기흥분증후군에서역방향방실회귀성빈맥의 Abstract 임상적및전기생리학적특성 * 최동훈 이문형 안신기 김성순 Electrophysiologic and Clinical Characteristics of Antidrom

Original Articles Korean Circulation J 1998;28 9 : WPW 증후군환자에서성공적인전극도자절제술후재분극이상 배장호 1 김윤년 1 한성욱 1 현대우 1 신이철 1 김기식 1 김권배 1 이상민 2 Repolarizatio

<B0E6C8F1B4EBB3BBB0FA20C0D3BBF3B0ADC1C E687770>

ºÎÁ¤¸ÆV10N³»Áö

ºÎÁ¤¸ÆÃÖÁ¾

Original Articles Korean Circulation J 2000;30 2 : 심방빈맥의고주파전극도자절제술 안신기 이문형 편욱범 김성순 Radiofrequency Catheter Ablation of Atrial Tachycardia Shink

ePapyrus PDF Document

Original Articles Korean Circulation J 1998;28 4 : 상심실성빈맥환자에서관상정맥동의형태비교 현대우 김윤년 박소영 한성욱 허승호 김기식 김권배 Coronary Sinus Morphology in Patients with

ºÎÁ¤¸ÆV10N³»Áö

서 론 대상 및 방법 대 상 706 Table 1. Characteristics of patients Number n 125 Age meansd 3514 Sex MF 7154 QRS duration sec Site of AP n Anterior 21 1

Lumbar spine

81 F Epigastric discomfort after meals for 3 hours

012임수진

충북의대학술지 Chungbuk Med. J. Vol. 27. No. 1. 1~ Charcot-Marie-Tooth Disease 환자의마취 : 증례보고 신일동 1, 이진희 1, 박상희 1,2 * 책임저자 : 박상희, 충북청주시서원구충대로 1 번지, 충북대학교

A 617

Original Articles 후중격에위치한우회로의전극도자절제술 Abstract 이문형 안신기 구본권 장길진 김건영 김성순 오동진 Catheter Ablation of The Posteroseptal Accessory Pathways Moon Hyo

hwp

ºÎÁ¤¸ÆV10N³»Áö

1..

김범수

Original Articles Korean Circulation J 2002;32 3 : 아데노신투여로방실결절내이중전도로의진단시 관찰되는방실차단의의의 한승환 1 김영훈 1 이현수 1 이호준 1 신성희 1 박창규 1 서홍석 1 심완주 1 오동주 1 노영무


한국성인에서초기황반변성질환과 연관된위험요인연구

139~144 ¿À°ø¾àħ

Treatment and Role of Hormaonal Replaement Therapy

노영남

YI Ggodme : The Lives and Diseases of Females during the Latter Half of the Joseon Dynasty as Reconstructed with Cases in Yeoksi Manpil (Stray Notes w

975_983 특집-한규철, 정원호


433대지05박창용

Microsoft PowerPoint - Benefits of CRT-D in CHF.ppt

황지웅

REVIEW ARTICLES International Journal of Arrhythmia 2017;18(1):43-47 doi: 심실상빈맥의감별진단 장성원 가톨릭대학교의과대학내과학교

Minimally invasive parathyroidectomy

< D B4D9C3CAC1A120BCD2C7C1C6AEC4DCC5C3C6AEB7BBC1EEC0C720B3EBBEC8C0C720BDC3B7C2BAB8C1A4BFA120B4EBC7D120C0AFBFEBBCBA20C6F2B0A E687770>


04_이근원_21~27.hwp

(

417

untitled

13.ÀÇÇа�ÁÂb61迵ÈÆ837~845’


歯M PDF


Supraventricular Tachycardia by Concealed Bypass Tract 방실회귀성빈맥의병태생리 방실우회로는정상전도계와순환회로를구성하여다양한종류의상심실성빈맥을유발한다. 가장흔히발생하는빈맥은정방향성방실회귀성빈맥 (orthodromic atriov

<B0E6C8F1B4EBB3BBB0FA20C0D3BBF3B0ADC1C E687770>

기관고유연구사업결과보고

ºÎÁ¤¸ÆÃÖÁ¾

°ø±â¾Ð±â±â

00약제부봄호c03逞풚

歯제7권1호(최종편집).PDF

부정맥 (Cardiac Arrhythmias, Dysrhythmias) ECG 는 atrium 에서 ventricle 로즉 (SA node AV node His bundle bundle branch Purkinje fiber) 의 normal route 를따라 depo

Abstract Background : Most hospitalized children will experience physical pain as well as psychological distress. Painful procedure can increase anxie


Àå¾Ö¿Í°í¿ë ³»Áö

( ) ) ( )3) ( ) ( ) ( ) 4) 1915 ( ) ( ) ) 3) 4) 285

대상 결과 Table 1. Charateristics of study patients Pt. Age/sex Diagnosis Pacemaker Mode 1 78/M SND BIOTRONIK PHYSIOS TC 01 DDD 2 60/M SND BIOTRONIK PHYSI

자기공명영상장치(MRI) 자장세기에 따른 MRI 품질관리 영상검사의 개별항목점수 실태조사 A B Fig. 1. High-contrast spatial resolution in phantom test. A. Slice 1 with three sets of hole arr

untitled


REVIEW ARTICLES Arrhythmia 2015;16(4): doi: 유두근심실빈맥 박예민 가천대학교길병원심장내과 Papillary Muscle Ventricula

<35335FBCDBC7D1C1A42DB8E2B8AEBDBAC5CDC0C720C0FCB1E2C0FB20C6AFBCBA20BAD0BCAE2E687770>

03-서연옥.hwp

歯kjmh2004v13n1.PDF


<342EBEC8BCBABFAD2CB9DAC7E2C1D82E687770>

Pharmacotherapeutics Application of New Pathogenesis on the Drug Treatment of Diabetes Young Seol Kim, M.D. Department of Endocrinology Kyung Hee Univ

Kbcs002.hwp

Analyses the Contents of Points per a Game and the Difference among Weight Categories after the Revision of Greco-Roman Style Wrestling Rules Han-bong

±è¹ÎÁö

,......

서론

16(1)-3(국문)(p.40-45).fm

현대패션의 로맨틱 이미지에 관한 연구

대한한의학원전학회지24권6호-전체최종.hwp

ePapyrus PDF Document

달생산이 초산모 분만시간에 미치는 영향 Ⅰ. 서 론 Ⅱ. 연구대상 및 방법 達 은 23) 의 丹 溪 에 최초로 기 재된 처방으로, 에 복용하면 한 다하여 난산의 예방과 및, 등에 널리 활용되어 왔다. 達 은 이 毒 하고 는 甘 苦 하여 氣, 氣 寬,, 結 의 효능이 있

12이문규

歯1.PDF

서론 34 2

노인정신의학회보14-1호

02이용배(239~253)ok

Æ÷Àå½Ã¼³94š

석사논문.PDF

<30372EC0CCC0AFC1F82E687770>

< C6AFC1FD28C3E0B1B8292E687770>

<B7CEC4C3B8AEC6BCC0CEB9AEC7D B3E23130BFF9292E687770>

<30382EC0C7C7D0B0ADC1C22E687770>

141(26) () ( ( ) () () () ) 2) 1932 ()()3) 2 1) ( ) ( ) () () () 4) ( ) 5) 6) ) ) ( ) () 42 () )

KIM Sook Young : Lee Jungsook, a Korean Independence Activist and a Nurse during the 이며 나름 의식이 깨어있던 지식인들이라 할 수 있을 것이다. 교육을 받은 간 호부들은 환자를 돌보는 그들의 직업적 소


16(2)-7(p ).fm

歯14.양돈규.hwp

10송동수.hwp

Case Reports Korean Circulation J 1999;29 10 : 제세동역치가높았던특발성심실세동에시술한 삽입형심실제세동기 ICD 1 예 송창석 김형주 박현용 박희백 장영광 차태준 주승재 이재우 Implantation of ICD in


Microsoft PowerPoint - 2- 남기병

<31382D322D3420BDC5B1D4C8AF5FB3EDB9AE28C3D6C1BEBABB292E687770>

Transcription:

Original Articles 27 9 1997 Wolff-Parkinson-White 증후군의임상상및 전기생리학적소견 * Abstract 안신기 1 이문형 1 장양수 1 오동진 2 최인석 3 하종원 1 임세중 1 김병옥 4 정남식 1 심원흠 1 조승연 1 김성순 1 Clinical and Electrophysiologic Characteristics of the Patients with Wolff-Parkinson-White Syndrome Shin-Ki Ahn, M.D., 1 Moon-Hyoung Lee, M.D., 1 Yang-Soo Jang, M.D., 1 Dong-Jin Oh, M.D., 2 In Suck Choi, M.D., 3 Jong Won Ha, M.D., 1 Se Joong Rim, M.D., 1 Byung-Ok Kim, M.D., 4 Nam-Sik Chung, M.D., 1 Won Heum Shim, M.D., 1 Seung Yun Cho, M.D., 1 Sung Soon Kim, M.D. 1 Cardiology Division, Yonsei Cardiovascular Center, 1 Yonsei University, Seoul, Korea Department of Internal Medicine, 2 Kang Dong Sacred Heart Hospital, Hallym University, Seoul, Korea Department of Internal Medicine, 3 Jung-ang Gil Hospital, Inchon, Korea Sanggye Paik Hospital, Department of Internal Medicine, 4 College of Medicine, Inje University, Seoul, Korea BackgroundWolff-Parkinson-White syndromewpw syndrome is well known and sometimes causes life-threatening arrhythmias. To date, the clinical and electrophysiologic characteristics of patients with WPW syndrome in Korea has not been available, though results of catheter ablation treatment for atrioventricular reentrant tachycardiaavrt including WPW syndrome were reported. MethodClinical and electrocardiographicecg characteristics and results of electrophysiologic study of consecutive 400 patients with WPW syndrome who underwent electrophysiologic study between December 1986 and September 1995 were analyzed. ResultsMean age of the patients was 35 years and male patients were more common262 male patients, 65.5%. Mean duration and frequency of palpitation episodes were 8.1 years and 4.2 times per month, respectively. Thirty six patients9.0% experienced syncopal episodes and the half of them were associated with atrial fibrillation. Two cases of aborted sudden cardiac death were associated with atrial fibrillation. Twenty four cases of congenital heart diseases and 13 cases of acquired heart diseases were found. The most commonly associated cardiac disease was Ebstein s anomaly8 cases, 2.0%. Clinically, 368 patients92.0% had ECG-documented tachycardias and 46 848

patients had two or more types of tachycardia. Orthodromic AVRT was the most common tachycardia 277 patients including 44 cases with coexisting atrial fibrillation. Atrial fibrillation was documented in 115 patients31.3% and antidromic AVRT in 23 patients6.2%. Patients with antidromic AVRT were more likely to have multiple accessory pathways compared to those with orthodromic AVRT 30.4% versus 4.3%. On electrophysiologic study, the most commonly inducible tachycardia was also orthodromic AVRT 344/389 cases, 89.8%. Antidromic AVRT was induced in 23 cases6.0%. Atrial fibrillation was present in 104 patients27.2%, especially in those with clinically documented atrial fibrillation71.3% vs 12.3%. In 17 patients without inducible tachycardias, ventriculoatrial conduction was absent or had long effective refractory period. Finally, 396 patients99.0% had clinically documented or inducible tachycardias. Eight patients with Ebsteins anomaly had right-sided accessory pathway87.5% except one case. Twenty four patients had secondary accessory pathway. The most common site of accessory pathway including secondary accessory pathway was left free wall204 cases, 48.1%. Other accessory pathways were found at right free wall123 cases, 29.0%, posteroseptal54 cases, 17.5% and anteroseptal site15 cases, 3.5% in order. ConclusionsThe clinical and electrophysiologic characteristics of patients in this series were similar with those of previous reports of other countries. Because certain types of tachyarrhythmia were associated with characteristic electrophysiologic findings such as the relationships between antidromic AVRT and presence of secondary accessory pathways or clinical atrial fibrillation and higher occurrence rate of atrial fibrillation during electrophysiologic study, it is important to document clinical tachyarrhythmias with ECG. And electrophysiologic study can have important clinical implications in diagnosis and especially in curative treatment. KEY WORDSWolff-Parkinson-White syndrome Clinical and electrophysiologic characteristics. 서론 대상및방법 1. 대상 2. 방법 849

결과 1. WPW 증후군환자의임상상 Fig. 1. Classification and distribution of 424 accessory pathways in 400 patients with WPW syndrome. AVNAV node, ASanteroseptal, MSmidseptal, LAleft anterior, LLleft lateral, LPleft posterior, LpLleft posterolateral, PSposteroseptal, RA:right anterior, RLright lateral, RPright posterior, RpL:right posterolateral 850

Table 1. Clinical profiles of 400 patients with WPW syndrome in Yonsei Cardiovascular Center Dec. 1986-Sep. 1995 Sex Male 262 Female 138 Age MeanS.D. 3515 years Range 375 years Symptoms Duration 8.17.6 years Frequency 4.29.8 times/month Duration of each episode 7.54.9 hours/episode Syncope% 369.0% Table 2. Associated cardiac anomalies in 400 patients with WPW syndrome Congenital 24 Ebstein s anomaly 8 ASD 5 Corrected TGV 2 Persistent left SVC 2 Dextrocardia 2 Hypoplastic CS 2 VSD 1 DORV 1 Rhabdomyoma 1 Acquired 13 Cardiomyopathy 5 Hypertrophic 3 Dilated 1 Tachycardia-mediated 1 MS, MR 4 AR, AS 3 TR 1 ARaortic regurgitation, ASaortic stenosis, ASD atrial septal defect, CScoronary sinus, DORVdouble outlet right ventricle, MSmitral stenosis, MRmitral regurgitation, TGVtransposition of great vessels, TR tricuspid regurgitation, SVC superior vena cava, VSDventricular septal defect 2. 임상적으로발현된부정맥 3. 전기생리학검사결과 1) 유도된부정맥 Table 3. Types of tachyarrhythmias in 368 patients with ECG documentation Types of tachycardias No% Orthodromic AVRT 277/36875.3 AVRT only 233 With Afib 43 With antidromic AVRT, Afib 1* Antidromic 23/368 6.2 Only 20 With Afib 2 With Afib, orthodromic AVRT 1* Afib 115/36831.3 Only 69 Afibatrial fibrillation, AVRTatrioventricular reentrant tachycardia *a patient with orthodromic and antidromic AVRT and atrial fibrillation including patients with AVRT 851

Fig. 2. Clinically documented tachyarrhythmias in 400 patients with WPW syndrome. Afibatrial fibrillation, AVRTatrioventricular reentrant tachycardia *Proportion among 368 documented tachyarrhythmias Table 4. Induced and clinically documented tachyarrhythmias in 400 patients with WPW syndrome Clinically documented arrhythmia Induced AVRT AVRT with afib arrhythmia Afib Not Ortho Anti Ortho Anti Both only documented AVRT Ortho 203 5 13 18 21 260 Anti 2 3 5 Both 1 8 2 11 Afib Only 3 4 1 23 3 34 +Ortho 16 25 1 24 66 + Anti 4 4 + Both 1 1 1 3 Not inducible 7 4 2 4 17 Total 233 20 43 2 1 69 32 400 Afibatrial fibrillation, Antiantidromic, AVRTatrioventricular reentrant tachycardia, Orthoorthodromic Total 852

Fig. 3. Induced tachyarrhythmias during electrophysiologic study. Orthodromic AVRT was most commonly documented and induced tachyarrhythmia. Atrial fibrillation was more likely to be induced in patients with clinically documented atrial fibrillation. AVRTOorthodromic AVRT, AVRTAantidr-omic AVRT, cwith, c/swith or without, Afibatrial fibrillation Table 5. Location of accessory pathways of 400 patients with WPW syndrome Site of accessory Primary Secondary Total% pathway Left free wall 196 8 20448.0 Lateral 147 3 15035.2 Posterior and posterolateral 39 5 4410.4 Anterior and anterolateral 10 10 2.4 Right free wall 117 6 12329.1 Lateral and posterolateral 52 2 5412.8 Posterior 35 2 37 8.7 Anterior 30 2 32 7.6 Posteroseptal 69 5 7417.5 Right-sided 59 3 6214.7 Left-sided 10 2 12 2.8 Anteroseptal 12 3 15 3.5 Midseptal 3 2 5 1.2 Para-Hisian 3 30.7 Total 400 24 424100.0 2) 우회로의분포 Fig. 4. AVRT type and multiple accessory pathways. Patients with multiple accessory pathways were more likely to have antidromic AVRTA. Antidromic AVRT was significantly associated with presence of multiple accessory pathwaysb. *Fisher s exact test p0.001 853

고안 854

855

856

요약 연구배경 : 방법 : 결과 : 결론 : 857

References 1) Wolff J, Parkinson J, White PD:Bundle branch block with short P-R interval in healthy young people prone to paroxysmal tachycardia. Am Heart J 5:685-704, 1930 2) Durrer D, Ross J:Epicardial excitation of the ventricles in patients with Wolff-Parkinson- White syndrome(type B). Circulation 35:15-21, 1967 3) Durrer D, Schoo L, Schullenberg RM, Wellens HJJ: The role of premature beats is the initiation and the termination of supraventricular tachycardia in the Wolff- Parkinson-White Syndrome. Circulation 36:644-662, 1967 4) Gallagher JJ, Pritcherr ELC, Sealy WC, Kasell J, Wallace AG:The preexcitation syndrome. Prog Cardiovasc Dis 20:285-327, 1978 5) Horowitz LN:Electrophysiologic evaluation of patients with preexcitation syndrome. Cardiology Clin 4:447-457, 1986 6) Jackman WM, Wang XZ, Friday KJ, Roman CA, Moulton KP, Beckman KJ, McClelland JH, Twidale N, Hazlitt HA, Prior M, Margolic PD, Calame JD, Overholt ED, Lazzara R:Catheter ablation of accessory atrioventricular pathways(wolff-parkinson-white syndrome) by radiofrequency current. N Engl J Med 324(23):1605-1611, 1991 7) Calkins H, Langberg J, Sousa J, E1-Atassi R, Leon A, Kou W, Kalbfleisch S, Morady F:Radiofrequency catheter ablation of accessory atrioventricular connections in 250 patients. Circulation 85:1337-1346, 1992 8) 김성순 : 심장부정맥에대한전극도자절제술. 대학의학협회지 5:673-682, 1992 9) 한규록 최기준 이명용 남기병 조주희 김효수 손대원 김철호 오병희 이명묵 박영배 최윤식 서정돈 이영우 :Radiofrequency catheter ablation 을이용한방실회귀성빈맥의치료. 순환기 25(5):920-929, 1995 10) 조정관 류제영 배열 류문희 서정평 조인종 이명곤 박종수 박주형 길광채 정명호 박종춘 강정채 : 방실우회로절제술의임상경험 : 고주파에너지를이용한전극도자방실우회로절제술의결과에영향하는인자들. 순환기 24(5) : 621-633, 1994 11) 김성순 : 조기흥분증후군. 대한의학협회지 31:628-643, 1988 12) Kent AFS:Researches on the structure and function of the mammalian heart. J Physiol 14:233-254, 1933 13) Cohn AE, Fraser FR:Paroxysmal tachycardia and the effect of stimulation on the vagus nerves by pressure. Heart 5:93-105, 1914 14) Wolferth CC, Wood FC:The mechanism of production of short P-R intervals and prolonged QRS complexes in patients with presumably undamaged hearts:hypothesis of accessory pathway of auriculoventricular conduction (Bundle of Kent). Am Heart J 8:297-311, 1933 15) Ouhnell RF:Preexcitation, a cardiac abnormality. Acta Med Scand(Suppl) 152:1-167, 1944 16) Anderson RH, Becker AE, Brechenmacher CI:Ventricular preexcitation:a proposed nomenclature for its substrates. Eur J Cardiol 3:27-35, 1975 17) Klein GJ, Heckel DB, Gallagher JJ:Anatomic substrate of impaired anterograde conduction over an accessory atrioventricular pathway in the Wolff-Parkinson-White syndrome. Circulation 61:1249-1256, 1980 18) Lev M, Gibson S, Miller RA:Ebstein s disease with Wolff-Parkinson-White syndrome. Am Heart J 49:724-741, 1955 19) Devereux RB, Perloff JK, Beichek N:Mitral valve prolapse. Circulation 54:3-14, 1976 20) Giardina ACV, Ehlers KH, Engle ME:Wolff-Parkinson- White syndrome in infants and children. A longterm followup study. Br Heart J 34:839-846, 1972 21) Vidaillet HJ, Pressley JC, Henke E, Harrell FE, German LD:Familial occurrence of accessory atrioventricular pathways(preexcitation syndrome). N Engl J Med 317: 65-69, 1987 22) Newman BJ, Donoso EM Friedberg CK:Arrhythmias in the Wolff-Parkinson-White syndrome. Prog Cardiovasc Dis 9:147-165, 1966 23) Munger TM, Packer DL, Hammill SC, Feldman BJ, Bailey KR, Ballard DJ, Holmes DR Jr, Gersh BJ:A population study of the natural history of Wolff-Parkinson- White syndrome in Olmsted County, Minnesota, 1953-1989. Circulation 87(3):866-873, 1993 24) Fontaine G, Frank R, Coutte R, Vedel JP, Gragogeat Y: Rhythme reciproque antidromique dans un syndrome Wolff- Parkinson-White de Type A(abstr). Ann Cardiol Angeiol 24:59-66, 1975 25) Beneditt DG, Pritchett ELC, Gallagher JJ:Spectrum of regular tachycardia with wide QRS complexes in patients with accessory atrioventricular pathways. Am J Cardiol 42:828-838, 1978 26) Zipes DP, Dejoeseph RI, Rothbaum DA:Unusual properties of accessory pathways. Circulation 49:1200-1211, 1974 27) Colavita PG, Packer DL, Pressley JC, Ellenbogen KA, O Callaghan WG, Gilbert MR, Germam LD:Frequency, diagnosis and clinical characteristics of patients with multiple accessory atrioventricular pathways. Am J Cardiol 59:601-606, 1987 28) Wellens HJJ, Brugada P:Value of programmed stimulation of the heart in patients with Wolff-Parkinson-White syndrome. In:Josephson ME, Wellens HJJ, Tachycardias. Philadelphia:Lea & Febiger, pp189, 1984 29) Atie J, Brugada P, Brugada J, Smeets JLO, Cruz FS, Peres A, Roukens MP, Wellens HJJ:Clinical and electrophysiologic characteristics of patients with antidromic 858

circus movement tachycardia in the Wolff-Parkinson-White syndrome. Am J Cardiol 66(15):1082-1091, 1990 30) Packer DL, Gallagher JJ, Prystowsky EN:Physiologic substrate for antidromic reciprocating tachycardia. Prerequisite characteristics of the accessory pathway and atrioventricular conduction system. Circulation 85(2): 574-588, 1992 31) Oren JW, Beckman KJ, McClelland KJ, McClelland JH, Wang X, Lazzara R, Jackman WM:A functional approach to the preexcitation syndromes. Cardiol Clin 11(1): 121-149, 1993 32) Yeh SJ, Wang CC, Wen MS, Lin FC, Wu D:Radiofrequency ablation in multiple accessory pathways and the physiologic implications. Am J Cardiol 71(13):1174-1180, 1993 33) Chen SA, Hsia CP, Chiang CE, Chiou CW, Yang CJ, Cheng CC, Tsang WP, Ting CT, Wang SP, Chiang BN: Reappraisal of radiofrequency ablation of multiple accessory pathways. Am Heart J 125(3):760-771, 1993 34) Wellens HJJ, Atie J, Smeets JLRM, Cruz FES, Gorgels AP, Brugada P:The electrocardiogram in patients with multiple accessory atrioventricular pathways. J Am Coll Cardiol 16:745-751, 1990 35) Gallagher JJ, Sealy WC, Kasell J, Wallace AG:Multiple accessory pathways in patients with the preexcitation syndrome. Circulation 54:571-591, 1976 36) Campbell RF, Smith RA, Gallagher JJ, Pritchett ELC, Wallace AG:Atrial fibrillation in the preexcitation syndrome. Am J Cardiol 40:514-520, 1977 37) Wellens HJJ, Durrer D:Wolff-Parkinson-White syndrome and atrial fibrillation:relation between refractory period of the accessory pathway and ventricular rate during atrial fibrillation. Am J Cardiol 34:777-782, 1974 38) Sung RJ, Castellanos A, Mallon SM, Bloom MG, Gelband G, Myerburg RJ:Mechanisms of spontaneous alteration between reciprocating tachycardia and atrial flutterfibrillation in the Wolff-Parkinson-White syndrome. Circulation 56:409-416, 1977 39) Dreifus LS, Wellens HJJ, Watanabe Y:Sinus bradycardia and atrial fibrillation associated with the Wolff- Parkinson-White syndrome. Am J Cardiol 38:149-156, 1976 40) Konoe A, Fukatani M, Tanigawa M, Isomoto S, Kadena M, Sakamoto T, Mori M, Shimizu A, Hashiba K:Electrophysiological abnormalities of the atrial muscle in patients with manifest Wolff-Parkinson-White syndrome associated with paroxysmal atrial fibrillation. Pacing Clin Electrophysiol 15(7):1040-1052, 1992 41) Bauernfeind RA, Wyndham CR, Swiryn SP, Palileo EV, Strasbery B, Lam W, Westver D, Rosen KM:Paroxysmal atrial fibrillation in the Wolff-Parkinson-White syndrome. Am J Cardiol 47:562-569, 1981 42) Klein GJ, Bashore TM, Selleers TD, Pritchett ELC, Smith WW, Gallagher JJ:Ventricular Fibrillation in the Wolff-Parkinson-White syndrome. N Engl J Med 30: 1980-1985, 1979 43) Sellers TD, Bashore TM, Gallagher JJ:Digitalis and the preexcitation syndrome. Analysis during atrial fibrillation. Circulation 56:260-266, 1977 44) McGovern B, Garan H, Ruskin JN:Precipitation of cardiac arrest by verapamil in patients with Wolff-Parkinson White syndrome. Ann Internal Med 104:791-794, 1986 45) Timmermans C, Smeets JL, Rodriguez LM, Vrouchos G, van den Dool A, Wellens HJJ:Aborted sudden death in the Wolff-Parkinson-White syndrome. Am J Cardiol 76(7): 492-494, 1995 46) Steinbeck G:Should radiofrequency current ablation be performed in asymptomatic patients with the Wolff-Parkinson-White syndrome? Pacing Clin Electrophysiol 16: 649-652, 199 859