Using leads I and aVF the axis can be calculated to within one of the four quadrants at a glance. If the axis is in the "left" quadrant take your second glance at lead II. both I and aVF +ve = normal axis both I and aVF -ve = axis in theNorthwest Territory ...
Heart rhythm (best seen in lead II) Heart rate (any lead) Cardiac axis (leads I and aVF) P-wave morphology and size (best seen in lead II) PR-interval duration (best seen in lead II) QRS-complex morphology and duration (assessed in all leads individually) ST-segment morphology (assesse...
III左上→左下avF正极连左下 胸导V14肋间胸骨右 V24肋间胸骨左 V3V2-V4中点 V45肋间左锁骨中线 V5腋前线V4水平 V6腋中线V4水平 ●Einthoven三角与六轴系统 ICUH InstituteofCardiology UnionHospital 2 Einthoventriangle LeadI=LA-RA LeadII=LF-RA ...
avL 正极连左上 III 左上左下 avF 正极连左下 胸导 V1 4肋间胸骨右 V2 4肋间胸骨左 V3 V2-V4中点 V4 5肋间左锁骨中线 V5 腋前线V4水平 V6 腋中线V4水平Einthoven三角与六轴系统ICUHInstitute of Cardiology Union Hospital2Einthoven triangleLead I= LA-RALead II=LF-RALead III=LF-LA Lead I +...
●I右上→左上avR正极连右上II右上→左下avL正极连左上III左上→左下avF正极连左下胸导V14肋间胸骨右V24肋间胸骨左V3V2-V4中点V45肋间左锁骨中线V5腋前线V4水平V6腋中线V4水平ICUH●Einthoven三角与六轴系统 InstituteofCardiologyUnionHospital Einthoventriangle theleftarm,rightarm,andleftlegformtheapexeso...
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。 3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
In the United States, Wilson and Goldberger pioneered the use of additional leads, namely aVR, aVL, aVF, and the 6 precordial leads (see the images below). [17, 18] The hexagonal reference system is the standard method of determining the axis of electrical activation of the heart. As ...
Einthoven trigoneHexaxial syst 4、emLead System of the ECGChest leads Chest leadsLead System of the ECG.ECG EVALUATION The Standard 12-lead ElectrocardiogramHow to measure each wave: amplitude duration25mm/sHow to calculate the heart rateHeart Rate = 60/R-R duration Mean QRS axisCardiac ...
The QRS complex duration is normal (0.08 sec). The QT/QTc intervals are normal (300/410 msec). However, the QRS complex has anabnormal morphology.The axis is right ward,between +90° and+180° (negative QRS complex...
What is Extreme right axis deviation (ERAD)? if the QRS lies between 180 & -90 What is Lead 1 and aVF during NAD? - Lead 1: Pos- aVF: Pos What is lead 1 and aVF during LAD? - Lead 1: Pos-aVF: Neg What is lead 1 and aVF during RAD? - Lead 1: Neg-aVF: Pos ...