Cardiology Heart Physiology I Cardiac Myocyte and Membrane Potential

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#ecg #ekg #drnajeeb #cardiology #medicaleducation • ECG | EKG | Chest Leads | Cardiology | Dr Najeeb🩺 • Like this video? • Sign up now on our website at https://www.DrNajeebLectures.com to access 1000+ Exclusive videos on Basic Medical Sciences Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles download options. Sign up now! Get Lifetime Access for a one-time payment of $24 ONLY! • Sign up now on our website at https://members.drnajeeblectures.com/ • --------------------------------------------------------------------------------------------------------------------------- • Why sign up for premium membership? Here's why! • Membership Features for premium website members. • 1. More than 1000+ Medical Lectures. • 2. Basic Medical Sciences Clinical Medicine. • 3. Mobile-friendly interface with android and iOS apps. • 4. English subtitles and new videos every week. • 5. Download option for offline video playback. • 6. Fanatic customer support and that's 24/7. • 7. Fast video playback option to learn faster. • 8. Trusted by over 2M+ students in 190 countries. • --------------------------------------------------------------------------------------------------------------------------- • ▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬ • E.C.G: Mastering Chest Leads (Precordial leads) • 00:00:00 Start • 00:00:15 Definition Of Chest Leads • 00:01:10 Visual Representation • 00:06:50 Unipolar Leads • 00:07:40 Placement • 00:08:50 Wilson Central Terminal • 00:10:35 Central Potential • 00:14:47 Functions Of Chest Leads • 00:19:00 Potential Determine By Chest Leads • 00:22:31 Placement Of Chest Leads • 00:25:33 Bony Landmarks • 00:30:22 Placement Of V1 And V2 • 00:32:56 Placement Of V4 • 00:33:23 Position Of V3 • 00:34:40 Position Of V5 • 00:35:23 Position Of V6 • 00:36:35 Preference Of Bony Landmarks Over Nipples Position • 00:39:30 Artefacts • 00:42:45 Classification Of Chest Leads • 00:52:33 Mi And Chest Leads • 00:58:22 Orientation Of Chest Leads • The electrical activity of the heart can be observed from the horizontal plane and the frontal plane. The ability of a lead to detect vectors in a certain plane depends on how the lead is angled in relation to the plane, which in turn depends on the placement of the exploring lead and the reference point. • For pedagogical purposes, consider a lead with one electrode placed on the head and the other electrode placed on the left foot. The angle of this lead would be vertical, from the head to the foot. This lead is angled in the frontal plane and it will primarily detect vectors traveling in that plane. Refer to Figure 17 panel A. Now consider a lead with an electrode placed on the sternum and the other electrode placed on the back (on the same level). This lead will be angled from the back to the anterior chest wall, which is the horizontal plane. This lead will primarily record vectors traveling in that plane. A schematic illustration is provided in Figure 15. Refer to Figure 17 panel B. • The limb leads, of which there are six (I, II, III, aVF, aVR and aVL), have the exploring electrode and the reference point placed in the frontal plane. These leads are therefore excellent for detecting vectors traveling in the frontal plane. The chest (precordial) leads (V1, V2, V3, V4, V5 and V6) have the exploring electrodes located anteriorly on the chest wall and the reference point located inside the chest. Hence, the chest leads are excellent for detecting vectors traveling in the horizontal plane. • As noted previously only three leads, namely leads I, II and III (which are actually Willem Einthoven’s original leads) are derived by using only two electrodes. The remaining nine leads use a reference which is composed of the average of either two or three electrodes. This will be clarified shortly. • --------------------------------------------------------------------------------------------------------------------------- • Join this channel to get access to perks: • Sign up now on our website at https://members.drnajeeblectures.com/... • / @doctornajeeb • Follow us on Facebook :- / drnajeeb • Follow us on Instagram :- / drnajeeblectures

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