Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Significance of late diastolic potential preceding purkinje potential in verapamil-sensitive idiopathic left ventricular tachycardia
Autore:
Tsuchiya, T; Okumura, K; Honda, T; Honda, T; Iwasa, A; Yasue, H; Tabuchi, T;
Indirizzi:
HirosakinUniv, Sch Med, Dept Internal Med 2, Hirosaki, Aomori 0368562, Japa Hirosaki Univ Hirosaki Aomori Japan 0368562 irosaki, Aomori 0368562, Japa Saiseikai Kumamoto Hosp, Ctr Cardiovasc, Kumamoto, Japan Saiseikai Kumamoto Hosp Kumamoto Japan Ctr Cardiovasc, Kumamoto, Japan Kumamoto Univ, Sch Med, Div Cardiol, Kumamoto 860, Japan Kumamoto Univ Kumamoto Japan 860 h Med, Div Cardiol, Kumamoto 860, Japan
Titolo Testata:
CIRCULATION
fascicolo: 18, volume: 99, anno: 1999,
pagine: 2408 - 2413
SICI:
0009-7322(19990511)99:18<2408:SOLDPP>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIOFREQUENCY CATHETER ABLATION; SLOW CONDUCTION; TRANSIENT ENTRAINMENT; REENTRY; ORIGIN; SITE;
Keywords:
tachycardia; potentials; catheter ablation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Okumura, K Hirosaki0368562,ch Med, Dept Internal Med 2, Zaifu Cho 5, Hirosaki, Aomori Hirosaki Univ Zaifu Cho 5 Hirosaki Aomori Japan 0368562 Aomori
Citazione:
T. Tsuchiya et al., "Significance of late diastolic potential preceding purkinje potential in verapamil-sensitive idiopathic left ventricular tachycardia", CIRCULATION, 99(18), 1999, pp. 2408-2413

Abstract

Background-Verapamil-sensitive idiopathic left ventricular tachycardia (VT) is due to reentry with an excitable gap. A late diastolic potential (LDP)is recorded during endocardial mapping of this VT, but its relation to thereentry circuit and significance in radiofrequency (RF) ablation remain tobe elucidated. Methods and Results-Sixteen consecutive patients with this specific VT were studied (12 men and 4 women; mean age, 32 years). In all patients, sustained VT was induced and during left ventricular endocardial mapping, LDP preceding Purkinje potential (PP) was recorded at the basal (11 patients), middle (3 patients), or apical septum (2 patients). The area with LDP recording was confined to a small region (0.5 to 1.0 cm(2)) in each patient and wasincluded in the area where PP was recorded (2 to 3 cm(2)), The relative activation times of LDP, PP, and local ventricular potential (V) at the LDP recording site to the onset of QRS complex were -50.4+/-18.9, -15.2+/-9.6, and 3.0+/-:13.3 ms, respectively, The earliest ventricular activation site during VT was identified at the posteroapical septum and was more apical in the septum than the region with LDP in every patient. In 9 patients, VT entrainment was done by pacing from the right ventricular outflow tract while recording LDP. During entrainment, LDP was orthodromically captured, and asthe pacing rate was increased, the LDP-to-PP interval was prolonged, whereas stimulus-to-LDP and PP-to-V interval were constant. In 3 patients, the pressure applied to the catheter tip at the LDP region resulted in conduction block between LDP and PP and in VT termination. RF energy application at the LDP recording site successfully eliminated VT. Conclusions LDP was suggested to represent the excitation at the entrance to the specialized area with a conduction delay in response to the increasein the rate within the critical slow conduction zone participating in the reentry circuit of this VT. LDP can be a useful marker for successful RF ablation for this VT.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:18:08