心智圖資源庫 診斷學:心電圖(1)
包含了心電圖機的構成:肢體導極和胸導極、心電圖的波形組成:四波和四段、心臟除極復極的4項原則。
This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
診斷:基本檢查法
診斷:心電圖診斷
醫學診斷思維導圖
醫學影像學:循環系統疾病診斷
臨床生物化學檢測
心臟的電生理學及生理特性
呼吸系統
診斷學:心電圖(2)
醫學解剖學-脈管系統
診斷學:問診(2)
心電圖(1)
十二導聯
肢體導聯
雙極肢體導聯
Ⅰ
Ⅱ
Ⅲ
加壓肢體導聯
aVR
aVL
aVF
胸導聯
V1
胸骨右緣第4肋間
V2
胸骨左緣第4肋間
V3
V2與V4連線中點
V4
左鎖骨中線與第5肋間相交處
V5
左腋前線與V4同一水平
V6
左腋中線與V4同一水平
紅,黃,綠,褐,黑,紫
正常心電活動
竇房結(興奮心房)-節間束-房室結-左右束支-浦肯野纖維(興奮心室)
四波
P波:心房除極波
QRS波:心室除極波
T波:心室快速復極波
U波:機制不明,暫稱心室後激動電位
四段
P-R間期:房室傳導時間,0.12-0.20s
QRS波間期:心室除極時間,0.06-0.10s
ST段:心室慢速復極期
QT間期:心室除極和復極的總時間,0.32~0.44s
心臟除極復極的4項基本原則
除極:正電位在前,負電位在後 復極:負電位在前,正電位在後
除極進行得快,波陡直而窄 復極進行得慢,波圓鈍而寬
探查電位對著正電位,描出向上的波 對著負電位描出向下的波
心臟的除極是由心內膜到心外膜 復極是由心外膜到心內膜