Arrhythmia by Dr. Najeeb (youtube) PDF

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Arrhythm Dr. najeeb lecture Normal heart rhythm criteria: 1. 2. 3. 4.

Heart rate 60 – 100 Origin from SA node All impulses propagate throug Impulses go in normal velocity

Arrhythmia: deviation from normal rhyth Classification according to heart rate:  Bradycardia or bradyarrythmia : less o 60 – 40 : mild o 40 – 20 : moderate o 20 – 0 : sever

o Nodal or junctional : from A  Ventricular arrhythmia : from ve Mechanisms of arrhythmia  Increased automaticity (e.g. increas epinephrine)  Triggered automaticity (in a myocar let Ca ion to get in and cause stimul  Re-entry ( circus movement)

Sinus arrhythmia and ECG pattern  Physiological Sinus arrhythmia : o during inspiration vagal is inhi o during expiration vagal is stim o if vagus is unable to influence autonomic N.S disease there w

o

Atrical tachyarrythmia and ecg  Atrial tachycardia (atria is acting as a pac o Well-defined multiple P waves

o Not well-defined Flutter waves

o

o  in treating these patients we want to low slow down the AV node.

Nodal (junctional) bradycardia and ECG

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bundle of Kent is an abnormal extra or access atria and ventricles that is present in a small per general population. This what is known as WPW syndrome)

o if an ectopic focus supply the bu happen  intranodal re-entry when there is two d have different speeds then this will happ  Carotid message induce vagal stimulatio the circus current. Ventricular tacharrhythmia and ECG  Mostly due to irritable focus in the ventr  In ischemia less O2 mean less ATP produc ATPase activity which restore the norma before depolarization. So sodium accum the threshold. o Also ischemia injure the cell memb cell and make same effect. o When ischemic patient get stresse stimulate Gs protein which induce...