許富康,郭航遠(yuǎn)
心房纖顫的發(fā)生是一個(gè)復(fù)雜的過程[1],包括折返激動(dòng)、觸發(fā)活動(dòng)、連綴現(xiàn)象、功能性阻滯區(qū)的異常傳導(dǎo)等。心房結(jié)構(gòu)重構(gòu)、電重構(gòu)、自主神經(jīng)重構(gòu)等是產(chǎn)生持續(xù)性心房纖顫的基礎(chǔ),但對(duì)于其確切的發(fā)生機(jī)制仍不明確。在人們對(duì)心房纖顫的認(rèn)識(shí)過程中,多折返學(xué)說(shuō)一直占主要地位。針對(duì)多折返學(xué)說(shuō),外科迷宮術(shù)發(fā)展了起來(lái),但由于外科迷宮術(shù)創(chuàng)傷較大,隨著介入技術(shù)的發(fā)展,并借鑒外科迷宮術(shù)的原理,出現(xiàn)了心房纖顫導(dǎo)管射頻消融術(shù)。隨著人們對(duì)局灶驅(qū)動(dòng)、心肌袖、電重構(gòu)等機(jī)制的認(rèn)識(shí),目前認(rèn)為心房纖顫的發(fā)生是由多種機(jī)制共同作用的結(jié)果[2-3]。根據(jù)人們對(duì)心房纖顫發(fā)生機(jī)制的認(rèn)識(shí),在射頻消融術(shù)治療中采取針對(duì)性的方案,形成了不同的射頻消融術(shù)式。本文就目前心房纖顫射頻消融術(shù)式及其并發(fā)癥的研究進(jìn)展作一綜述。
折返激動(dòng)、心肌袖發(fā)放快速電沖動(dòng)等參與了心房纖顫的發(fā)生。研究發(fā)現(xiàn),針對(duì)心房肌局部解剖的電活動(dòng)異常,可采取熱能或冷凍方式使局部心肌壞死,從而達(dá)到根治的目的,即射頻消融術(shù)[4]。射頻消融術(shù)是將電極導(dǎo)管經(jīng)靜脈或動(dòng)脈血管送入心腔特定部位,釋放射頻電流導(dǎo)致局部心內(nèi)膜及心內(nèi)膜下心肌凝固性壞死,從而達(dá)到阻斷快速心律失常異常傳導(dǎo)束和起源點(diǎn)的介入性技術(shù)。目前是根治心房纖顫等心律失常的重要手段[5]。
隨著人們對(duì)心房纖顫發(fā)生機(jī)制認(rèn)識(shí)的深入以及臨床治療經(jīng)驗(yàn)的積累,在世界不同的醫(yī)療中心已形成多種有效的心房纖顫射頻消融術(shù)式。
2.1 內(nèi)鏡指引下的射頻消融術(shù) 常規(guī)導(dǎo)管射頻消融術(shù)是在不可視情況下,借助透視或器械重建并依據(jù)臨床經(jīng)驗(yàn)進(jìn)行的治療。以此方式進(jìn)行的手術(shù)過程中不能確保消融線完成,因而難以保證手術(shù)成功率。最近在對(duì)89例持續(xù)性心房纖顫患者進(jìn)行的內(nèi)鏡指引下射頻消融術(shù)(包括肺靜脈隔離、左心房后壁隔離、左心耳切除)研究中發(fā)現(xiàn),該手術(shù)方法安全有效,手術(shù)過程中無(wú)死亡發(fā)生,術(shù)后早、晚期無(wú)卒中等并發(fā)癥發(fā)生,術(shù)后6、12、24個(gè)月時(shí)隨訪手術(shù)成功率分別為88%、90%、90%,術(shù)后不依賴藥物的有效率分別為71%、82%、90%[6]。Boersma等[7]對(duì)伴左心房增大和高血壓、藥物治療無(wú)效或?qū)Ч芟谑〉幕颊哌M(jìn)行隨機(jī)導(dǎo)管消融或內(nèi)鏡指引下的射頻消融治療研究發(fā)現(xiàn),盡管內(nèi)鏡指引下的射頻消融術(shù)后并發(fā)癥發(fā)生率較高,但其療效明顯優(yōu)于導(dǎo)管消融術(shù)。Wang等[8]進(jìn)行的相似研究亦顯示,胸腔鏡輔助微創(chuàng)消融術(shù)安全可行,隨訪1.0~3.6年顯示微創(chuàng)組療效優(yōu)于導(dǎo)管射頻消融組,同時(shí)前者減少了透視時(shí)間和X線曝光量。
2.2 常規(guī)導(dǎo)管射頻消融術(shù) 隨著介入技術(shù)的發(fā)展,模仿外科的迷宮術(shù),出現(xiàn)了導(dǎo)管射頻消融術(shù)[9]。早期在心房底進(jìn)行線性消融,由于其成功率低,僅為40%~50%,且并發(fā)癥發(fā)生率高而中斷[10]。
隨著研究的進(jìn)展,人們發(fā)現(xiàn)肺靜脈肌袖處異常電位可誘發(fā)心房纖顫,對(duì)該區(qū)進(jìn)行抑制即可根治心房纖顫。在早期研究中發(fā)現(xiàn),僅將肺靜脈內(nèi)異常興奮灶作為目標(biāo),術(shù)后8個(gè)月62%的患者無(wú)復(fù)發(fā),但70%左右的患者需要復(fù)雜的手術(shù)過程[8]。在另一研究中發(fā)現(xiàn),術(shù)后隨訪6個(gè)月,手術(shù)成功率達(dá)86%[11]。
隨著臨床實(shí)踐的深入,人們發(fā)現(xiàn)異常電位可發(fā)生于不同部位,包括左心房后壁、房間隔、冠狀動(dòng)脈竇等[12]。因此,心房纖顫射頻消融術(shù)從早期的單純肺靜脈異位灶消融發(fā)展至整個(gè)肺靜脈肌袖隔離。在對(duì)70例陣發(fā)性心房纖顫和心房撲動(dòng)患者的研究中發(fā)現(xiàn),73%的患者術(shù)后4個(gè)月無(wú)復(fù)發(fā),但有29%的患者仍需二次手術(shù),且術(shù)后2個(gè)月內(nèi)易復(fù)發(fā)[13]。
近年來(lái)研究發(fā)現(xiàn),局部興奮灶也是心房纖顫維持的重要因素[14]。在對(duì)36例患者進(jìn)行局部興奮灶射頻消融聯(lián)合傳統(tǒng)的肺靜脈隔離消融術(shù)和對(duì)71例患者只進(jìn)行傳統(tǒng)射頻消融術(shù)近1年的隨訪研究中發(fā)現(xiàn),前者有效率明顯高于后者(82.4%與44.9%)[15]。Verma等[16]發(fā)現(xiàn),單純進(jìn)行局部咖啡電位消融術(shù)的療效并不滿意。
經(jīng)過眾多的臨床實(shí)踐驗(yàn)證,肺靜脈隔離聯(lián)合左心房碎裂電位消融術(shù)和線性消融術(shù)具有較好的療效和安全性,目前已成為主要的常規(guī)射頻消融術(shù)式。但由于兩者仍存在一定的復(fù)發(fā)性和并發(fā)癥發(fā)生風(fēng)險(xiǎn),因此,臨床實(shí)踐中仍需不斷探索在兩者基礎(chǔ)上的改進(jìn)術(shù)式及新的術(shù)式。Hocini等[17]研究發(fā)現(xiàn),永久性心房纖顫患者左心耳內(nèi)局部折返性房性心動(dòng)過速可導(dǎo)致心房纖顫再發(fā),需要再次進(jìn)行射頻消融術(shù)。因此,對(duì)左心耳內(nèi)局部的消融可減少心房纖顫再發(fā)及再次手術(shù)的概率。Watanabe等[18]對(duì)動(dòng)物進(jìn)行的實(shí)驗(yàn)研究中發(fā)現(xiàn),在常規(guī)消融術(shù)式基礎(chǔ)上聯(lián)合右心房線性消融術(shù)能提高消融效果和手術(shù)成功率。Pak 等[19]研究發(fā)現(xiàn),對(duì)于有經(jīng)驗(yàn)的臨床醫(yī)生,如果確認(rèn)了導(dǎo)致心房纖顫發(fā)生的靶肺靜脈,可以單純對(duì)靶肺靜脈隔離,取得與經(jīng)驗(yàn)性的4個(gè)肺靜脈同時(shí)隔離時(shí)相似的長(zhǎng)期療效,并且減少了射頻消融能量和手術(shù)時(shí)間。
常規(guī)肺靜脈隔離聯(lián)合左心房線性消融術(shù)易導(dǎo)致心房食管瘺,Kumagai等[20]提出了“盒子消融”術(shù)式,即同側(cè)肺靜脈前部連續(xù)消融,然后在左心房頂部和底部進(jìn)行線性消融以隔離左心房后部,可取得左心房后部包括肺靜脈的完全隔離,并可有效避免心房食管瘺的發(fā)生。
2.3 冷凍球囊消融術(shù) 由于常規(guī)導(dǎo)管射頻消融術(shù)存在技術(shù)復(fù)雜、手術(shù)時(shí)間長(zhǎng)、費(fèi)用較高等弊端,因此需要安全、有效、經(jīng)濟(jì)、方便且重復(fù)性強(qiáng)的消融技術(shù)。冷凍球囊消融則有可能成為一種很好的消融技術(shù)[21]。該技術(shù)經(jīng)濟(jì),不需進(jìn)行左心房三維重建,且與常規(guī)導(dǎo)管射頻消融術(shù)同樣有效[22]。研究發(fā)現(xiàn),冷凍球囊消融術(shù)5年內(nèi)的成功率達(dá)53%[23],并且能有效減少透視時(shí)間和手術(shù)持續(xù)時(shí)間[24]。但冷凍球囊消融術(shù)同樣存在不足,如可能在隔離右上肺靜脈時(shí)導(dǎo)致膈神經(jīng)麻痹等,然而這種損傷多見于應(yīng)用小球囊(直徑23 mm)時(shí),若改用大球囊則可極大降低此種危險(xiǎn)[25]。
2.4 依靠標(biāo)測(cè)系統(tǒng)的射頻消融術(shù) 隨著臨床技術(shù)的不斷進(jìn)步,出現(xiàn)了CARTO電解剖標(biāo)測(cè)系統(tǒng)、EnSite-NavX三維接觸標(biāo)測(cè)系統(tǒng)等,有效提高了手術(shù)成功率,減少了并發(fā)癥的發(fā)生,并縮短了手術(shù)持續(xù)時(shí)間和曝光時(shí)間。標(biāo)測(cè)系統(tǒng)為接觸性磁場(chǎng)空間定位標(biāo)測(cè)系統(tǒng),通過專用標(biāo)測(cè)電極的空間移動(dòng)采取樣點(diǎn),多點(diǎn)采樣后構(gòu)建三維解剖構(gòu)形。Pappone 等[26]依靠無(wú)射線的CARTO標(biāo)測(cè)系統(tǒng),在對(duì)26例患者進(jìn)行免費(fèi)治療的研究中發(fā)現(xiàn),術(shù)后9個(gè)月時(shí)85%的患者無(wú)復(fù)發(fā),62%的患者無(wú)需服用抗心律失常藥物。隨著依靠標(biāo)測(cè)系統(tǒng)的射頻消融術(shù)在臨床的推廣應(yīng)用,陣發(fā)性心房纖顫患者中成功率達(dá)90%,持續(xù)性心房纖顫患者中成功率達(dá)80%[27]。
Nademanee 等[28]依靠CARTO標(biāo)測(cè)系統(tǒng)對(duì)心房復(fù)雜破碎電位定位進(jìn)行射頻消融術(shù),術(shù)后1年的成功率達(dá)91%。Tang等[29]和Finlay 等[30]研究發(fā)現(xiàn),依靠CartoMerge標(biāo)測(cè)系統(tǒng)較CartoXP、NavX標(biāo)測(cè)系統(tǒng)可進(jìn)一步減少射頻消融時(shí)間和透視時(shí)間,且不影響對(duì)陣發(fā)性心房纖顫患者射頻消融的治療效果。
Steven 等[31]研究發(fā)現(xiàn),依靠三維標(biāo)測(cè)系統(tǒng),由機(jī)器人導(dǎo)航進(jìn)行的心房纖顫導(dǎo)管消融術(shù)可更有效地減少透視時(shí)間和醫(yī)護(hù)人員的曝光量,同時(shí)能對(duì)心房纖顫的治療達(dá)到較好效果,且安全性高。另外Kettering 等[32]研究發(fā)現(xiàn),CT或磁共振3D重建技術(shù)能輔助三維標(biāo)測(cè)系統(tǒng)進(jìn)行射頻消融術(shù),增加其安全性。
2.5 無(wú)射線射頻消融術(shù) Reddy 等[33]依靠三維電解剖標(biāo)測(cè)系統(tǒng)和超聲心動(dòng)圖監(jiān)測(cè),在無(wú)射線輔助下,成功對(duì)20例陣發(fā)性心房纖顫患者進(jìn)行射頻消融治療,并取得了較好的效果。
2.6 自主神經(jīng)結(jié)射頻消融術(shù) 研究發(fā)現(xiàn),陣發(fā)性心房纖顫患者的心房?jī)?nèi)激動(dòng)傳導(dǎo)時(shí)間和局部電活動(dòng)時(shí)間延長(zhǎng),而迷走神經(jīng)興奮能增強(qiáng)乙酰膽堿依賴性K+離子流,延長(zhǎng)心房?jī)?nèi)傳導(dǎo)時(shí)間間期、心房完全興奮時(shí)間間期和心房激動(dòng)時(shí)間間期,有利于心房?jī)?nèi)折返激動(dòng)的發(fā)生及穩(wěn)定[34]。同時(shí)有研究發(fā)現(xiàn),心房纖顫患者亦可出現(xiàn)交感神經(jīng)功能增強(qiáng),腎上腺素受體依賴性舒張期鈣釋放增加,導(dǎo)致與遲后去極化相關(guān)的異位興奮除極增加[35]。這可能是迷走神經(jīng)及交感神經(jīng)參與心房纖顫發(fā)生的重要機(jī)制。而迷走、交感自主神經(jīng)重構(gòu)的惡性循環(huán)促進(jìn)了心房纖顫的發(fā)生和持續(xù)[36]。
根據(jù)以上研究,心房纖顫模型在進(jìn)行肺靜脈隔離射頻消融術(shù)的同時(shí)對(duì)肺靜脈口周圍的自主神經(jīng)功能結(jié)射頻消融,可降低心房激動(dòng)的波譜主頻,延長(zhǎng)心房不應(yīng)期,降低心房易損性。其效果可能取決于自主神經(jīng)的重構(gòu)情況[36]。然而最近有研究發(fā)現(xiàn),在肺靜脈隔離基礎(chǔ)上對(duì)左心房覆蓋有神經(jīng)節(jié)叢的心外膜脂肪墊區(qū)進(jìn)行射頻消融術(shù)效果較好,心房纖顫復(fù)發(fā)率低[37]。合并有高血壓的心房纖顫患者在肺靜脈隔離治療的基礎(chǔ)上,對(duì)腎動(dòng)脈去神經(jīng)能結(jié)射頻消融,可減少心房纖顫的復(fù)發(fā)[38]。Pokushalov 等[39]對(duì)58例藥物治療無(wú)效的心房纖顫患者行左心房4處神經(jīng)節(jié)叢射頻消融術(shù)發(fā)現(xiàn),94.1%的患者術(shù)轉(zhuǎn)為竇性心律,隨訪(7.2 ± 0.4)個(gè)月,86.2%的患者仍維持竇性心律而不需服用藥物。
2.7 聯(lián)合左心耳封閉術(shù)的射頻消融術(shù) 射頻消融術(shù)短期療效尚可,但長(zhǎng)期隨訪發(fā)現(xiàn)其成功率均低于50%。左心房增大是心房纖顫發(fā)生的重要因素,也是引起腦栓塞的病理解剖基礎(chǔ)[40]。一項(xiàng)可行性研究發(fā)現(xiàn),在對(duì)30例心房纖顫患者行射頻消融術(shù)的同時(shí),對(duì)左心耳采取Watchman封閉器封堵術(shù),手術(shù)均能順利完成,隨訪1年后約30%的患者復(fù)發(fā),無(wú)血栓栓塞并發(fā)癥發(fā)生[41]。因此,聯(lián)合左心耳封閉術(shù)的射頻消融術(shù)可能是治療心房纖顫患者較好的手術(shù)方式,但仍需大量臨床研究驗(yàn)證。
2.8 混合射頻消融術(shù) 外科迷宮術(shù)是對(duì)心房?jī)?nèi)、中、外形成透壁性有創(chuàng)瘢痕的分割,而心內(nèi)膜射頻消融術(shù)是對(duì)心房?jī)?nèi)膜進(jìn)行的分割,對(duì)心房?jī)?nèi)、外膜同時(shí)進(jìn)行射頻消融分割是否安全、有效值得進(jìn)一步研究。在一項(xiàng)小樣本研究中發(fā)現(xiàn)[42],對(duì)心內(nèi)、外膜同時(shí)行射頻消融術(shù)是可行且安全的方法,術(shù)后半年有72.2%的患者為竇性心律,術(shù)后1年這部分患者中的80.0%仍為竇性心律。
提高心房纖顫射頻消融術(shù)的療效是改進(jìn)消融技術(shù)的主要目標(biāo),同時(shí)減少并發(fā)癥的發(fā)生也是改進(jìn)消融技術(shù)追求的重要方面。心房纖顫射頻消融術(shù)的并發(fā)癥可發(fā)生于該過程的任一步,其相關(guān)并發(fā)癥主要有肺靜脈狹窄、栓塞事件、心房食管瘺及心房撲動(dòng)等[43]。
早期由于采取對(duì)肺靜脈異常興奮灶進(jìn)行點(diǎn)消融的措施,使得肺靜脈狹窄的發(fā)生率較高[44]。隨著對(duì)消融技術(shù)的改進(jìn),采用肺靜脈口周圍消融術(shù)代替肺靜脈內(nèi)異常興奮灶點(diǎn)消融術(shù),使得肺靜脈狹窄發(fā)生率明顯降低。同時(shí)有報(bào)道稱,采取心腔內(nèi)超聲心動(dòng)圖檢測(cè)微氣泡的形成以指導(dǎo)射頻消融的能量,亦能降低肺靜脈狹窄的發(fā)生率[45]。
栓塞性腦卒中是心房纖顫射頻消融術(shù)的嚴(yán)重并發(fā)癥,其發(fā)生率為0.1%~5.0%。研究發(fā)現(xiàn),大劑量的肝素應(yīng)用能減少心房血栓的形成[46]。射頻消融應(yīng)用肝素使得活化凝血時(shí)間在250~300 ms時(shí),左心房血栓發(fā)生率為11.2%;而使得活化凝血時(shí)間在300 ms以上時(shí),左心房血栓的發(fā)生率為2.8%。因此,射頻消融術(shù)過程中較大的肝素應(yīng)用量能降低栓塞事件的發(fā)生率。
心房食管瘺是較罕見的心房纖顫射頻消融術(shù)后并發(fā)癥,在肺靜脈點(diǎn)消融術(shù)和解剖指示下肺靜脈口環(huán)狀消融術(shù)中均有報(bào)道[47-48]。心房食管瘺的發(fā)生多是由于在左心房后壁形成較重的消融瘢痕,從而使得心房穿孔的概率增加所致。該并發(fā)癥易出現(xiàn)突發(fā)意識(shí)障礙或感染性心內(nèi)膜炎,且常是致命的。
在心房纖顫消融過程中或消融后,心房撲動(dòng)或房性心動(dòng)過速是較常見的并發(fā)癥[49],與射頻消融形成的瘢痕有關(guān),多由于該消融瘢痕未形成完整的線或瘢痕局部形成折返導(dǎo)致[50]。對(duì)于出現(xiàn)心房撲動(dòng)或房性心動(dòng)過速的患者,可進(jìn)一步將該射頻消融線延長(zhǎng)至左房室瓣環(huán)或再次行射頻消融術(shù)治療[51]。
4.1 心房纖顫射頻消融術(shù)的優(yōu)點(diǎn) 研究發(fā)現(xiàn),心房纖顫或心房撲動(dòng)患者的生活質(zhì)量較其他心律失常患者的生活質(zhì)量低[52]。對(duì)心房纖顫患者行射頻消融術(shù)的研究發(fā)現(xiàn),術(shù)后心房纖顫患者可恢復(fù)竇性心律,改善左心功能和臨床癥狀,提高運(yùn)動(dòng)耐力和生活質(zhì)量[53-54]。同時(shí),射頻消融術(shù)能降低心力衰竭的發(fā)病率和因心力衰竭導(dǎo)致的死亡、栓塞事件的發(fā)生率[55]。在對(duì)相似臨床研究進(jìn)行的Meta分析中亦證實(shí)了射頻消融術(shù)能夠改善患者臨床癥狀,提高生活質(zhì)量[56]。
4.2 心房纖顫射頻消融術(shù)的局限性 在比利時(shí)進(jìn)行的一項(xiàng)關(guān)于心房纖顫射頻消融術(shù)療效和花費(fèi)的對(duì)比研究中發(fā)現(xiàn)[57],830例首次行射頻消融術(shù)的患者,1年后的復(fù)發(fā)率達(dá)59.8%,2年后復(fù)發(fā)率達(dá)65.9%,而每例患者的花費(fèi)達(dá)9 600歐元(1歐元≈8.31元),并且除去仍需藥物控制節(jié)律或心率的患者,僅15.8%的患者適合選擇射頻消融術(shù)。此外,由于多數(shù)患者1年或更長(zhǎng)時(shí)間無(wú)復(fù)發(fā)[58],但對(duì)于大多數(shù)患者長(zhǎng)期復(fù)發(fā)的可能性非常大,尤其是對(duì)于合并心力衰竭或其他嚴(yán)重器質(zhì)性心臟病的患者。因此,是否對(duì)射頻消融術(shù)后患者采取相關(guān)的明確的治療方案來(lái)抑制心房纖顫復(fù)發(fā)或轉(zhuǎn)變成陣發(fā)性心房纖顫,對(duì)于大部分患者,尤其是對(duì)有卒中發(fā)生風(fēng)險(xiǎn)的患者具有重要的指導(dǎo)意義。
多項(xiàng)研究顯示,心房纖顫射頻消融術(shù)是大量需要藥物或電擊復(fù)律的患者較好的治療方法[56,59]。但這些研究仍然有限,并且尚無(wú)足夠令人信服的證據(jù)說(shuō)明消融的確切部位和絕對(duì)的手術(shù)成功率。
對(duì)歐洲24家電生理(electrophysiology,EP)研究中心的調(diào)查顯示,有11家(45.8%)進(jìn)行獨(dú)立的外科射頻消融術(shù),7家只進(jìn)行無(wú)體外循環(huán)支持的胸腔鏡射頻消融術(shù),而常用的肺靜脈隔離射頻消融術(shù)主要在5家中心進(jìn)行,另有8家中心在行心臟外科手術(shù)時(shí)對(duì)不同消融瘢痕的效果進(jìn)行了驗(yàn)證[60]。因此,當(dāng)前對(duì)心房纖顫的射頻消融仍然沒有統(tǒng)一的手術(shù)方式。對(duì)心房纖顫發(fā)生的可能機(jī)制仍需采取合適的射頻消融術(shù)式進(jìn)行驗(yàn)證。就目前研究現(xiàn)狀,心房相連的大靜脈上的心肌袖發(fā)放快速電沖動(dòng)是被大多數(shù)學(xué)者接受的心房纖顫發(fā)生的主要機(jī)制,針對(duì)其采用導(dǎo)管電極環(huán)肺靜脈口消融術(shù),形成大靜脈與心房的電隔離;或聯(lián)合在心房?jī)?nèi)的某些線形消融術(shù),是當(dāng)前主要的術(shù)式,也是以后發(fā)展的主要方向。
心房纖顫是嚴(yán)重威脅患者健康的疾病,射頻消融術(shù)的出現(xiàn)為心房纖顫的根治提供了可能。隨著對(duì)心臟電生理機(jī)制認(rèn)識(shí)的深入,人們對(duì)心房纖顫的認(rèn)識(shí)也有了質(zhì)的改變,推動(dòng)了心房纖顫射頻消融術(shù)式的改進(jìn);并且隨著科技的不斷進(jìn)步,心房纖顫射頻消融術(shù)得到了不斷更新的技術(shù)支持,CARTO、Ensite 3000三維標(biāo)測(cè)系統(tǒng)等先進(jìn)設(shè)備的出現(xiàn),使得心房纖顫射頻消融術(shù)發(fā)展進(jìn)程中所需的支撐從設(shè)想變成了現(xiàn)實(shí),推動(dòng)著心房纖顫射頻消融技術(shù)的革新;同時(shí)隨著臨床專業(yè)的細(xì)化,使得心房纖顫能在較集中的中心進(jìn)行治療,為臨床醫(yī)師提供了更多的實(shí)踐機(jī)會(huì),較大地推動(dòng)了心房纖顫射頻消融術(shù)的進(jìn)步。因此,隨著醫(yī)學(xué)理論及實(shí)踐的不斷進(jìn)步,心房纖顫射頻消融術(shù)式仍會(huì)有較大進(jìn)展。
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