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Showing posts with label Notes. Show all posts
Showing posts with label Notes. Show all posts

Sunday, July 24, 2011

PSYCHIATRY - PPT Lectures

Posted by Sharan R On 2:09 AM

Lectures PPT - Obstetrics & Gynecology

Posted by Sharan R On 1:40 AM


Power Point Presentations of World Experts

www.obgyn.net/educational-tutorials/educational-tutorials.asp
There are many of them , the site is full of presentations
But there is copyright on it.. Download them there itself..

Educational Tutorials: Categories

Dental Lecture Notes

Posted by Sharan R On 1:30 AM

Saturday, July 23, 2011

ECG Basics II - How to Analyze a Rhythm Lectures

Posted by Sharan R On 1:07 AM


• Step 1: Calculate rate.
• Step 2: Determine regularity.
• Step 3: Assess the P waves.
• Step 4: Determine PR interval.
• Step 5: Determine QRS duration.





Step 1: Calculate Rate

• Option 1
– Count the # of R waves in a 6 second rhythm strip, then multiply by 10.
– Reminder: all rhythm strips in the Modules are 6 seconds in length.

Interpretation? 9 x 10 = 90 bpm



• Option 2

– Find a R wave that lands on a bold line.
– Count the # of large boxes to the next R wave. If the second R wave is 1 large box away the rate is 300, 2 boxes - 150, 3 boxes - 100, 4 boxes - 75, etc.
– Memorize the sequence:
300 - 150 - 100 - 75 - 60 - 50



Step 2: Determine regularity

• Look at the R-R distances (using a caliper or markings on a pen or paper).
• Regular (are they equidistant apart)? Occasionally irregular? Regularly irregular? Irregularly irregular?

Interpretation? Regular




Step 3: Assess the P waves

• Are there P waves?
• Do the P waves all look alike?
• Do the P waves occur at a regular rate?
• Is there one P wave before each QRS?
Interpretation? Normal P waves with 1 P wave for every QRS



Step 4: Determine PR interval

• Normal: 0.12 - 0.20 seconds.
(3 - 5 boxes)

Interpretation?0.12 seconds



Step 5: QRS duration

• Normal: 0.04 - 0.12 seconds.
(1 - 3 boxes)
Interpretation? 0.08 seconds



Rhythm Summary

• Rate 90-95 bpm
• Regularity regular
• P waves normal
• PR interval 0.12 s
• QRS duration 0.08 s
Interpretation?  Normal Sinus Rhythm

DOWNLOAD this presentation

thanks: Aslam@mediconet

ECG Basics - PPT Lectures

Posted by Sharan R On 1:00 AM

Normal Impulse Conduction
Sinoatrial node--AV node--Bundle of His--Bundle Branches--Purkinje fibers




The “PQRST”
►    P wave - Atrial   depolarization


        QRS - Ventricular    depolarization
        T wave - Ventricular   repolarization




The PR Interval
Atrial depolarization
+
delay in AV junction
 (AV node/Bundle of His)

 (delay allows time for the atria to contract before the ventricles contract)



Pacemakers of the Heart
►    SA Node - Dominant pacemaker with an intrinsic rate of 60 - 100 beats/minute.

►    AV Node - Back-up pacemaker with an intrinsic rate of 40 - 60 beats/minute.

►    Ventricular cells - Back-up pacemaker with an intrinsic rate of 20 - 45 bpm.



The ECG Paper


►    Horizontally
    One small box - 0.04 s
    One large box - 0.20 s
►    Vertically
    One large box - 0.5 mV

►    Every 3 seconds (15 large boxes) is marked by a vertical line.
►    This helps when calculating the heart rate.

DOWNLOAD this presentation

Download Rest of ECG PPT Slides:

Monday, July 18, 2011

Lecture Notes - Ophthalmology - 9th Edition

Posted by Sharan R On 8:42 AM

Rapidshare Link:
Download (PDF - 5mb)