Transcript 04 Lecture - 3 Cardiac Arrhythmia-2-25-2

Prof. Ashraf Husain

Arrhythmia is defined as irregular impulse
formation in the form of rate, conduction or
change in interrelationship of timing of R-R
interval
Change
slope
Symp.
Change
thrashold
Phase 4
change in
slope. PS
Change
in RMP
Atrial re-entry



Atrial tachycardia
Atrial fibrilation
Atrial flutter
AV Nodal re-entry

Supraventricular tachycardias
AV re-entry (Aberent)


WPW synd.
Supraventricular tachy
Ventricular re-entry

Ventricular tachycardias

many go unnoticed and produce no symptoms

palpitations - ranging from ³noticing´ or ³being aware´ of ones
heartbeat to a sensation of the heart ³beating out of the chest´

if Q is affected (HR > 300) - lightheadedness and syncope,
fainting

drugs & electrolyte imbalances - antiarrhythmic drugs,
hypokalemia,imbalances of calcium and magnesium

very rapid arrhythmias u myocardial oxygen demand r
ischemiaand angina

sudden death - especially in the case of an acute MI‡mechanism
differentiation from ECG very difficult to impossible