Arrhythmias : Pathogenesis and Types | Dr. Shikha Parmar

Arrhythmias : Pathogenesis and Types by Dr. Shikha Parmar
An arrhythmia is a problem with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slowly, or with an irregular rhythm. When a heart beats too fast, the condition is called tachycardia. When a heart beats too slowly, the condition is called bradycardia.

[@owoeyepaul8995]

Best Pharmacology teacher ever💫

[@DrShikhaParmarClasses]

Thanks a lot for liking and appreciating the video.

[@brutal01pubg56]

One of the best class i have ever seen about arrythmia.... do more videos mam

[@brutal01pubg56]

I understood everything

[@ramendrakumar9522]

Thank you mam 🙏🙏

[@Vmanmeme]

Mam why forward impulse is block not backward impulse please explain

[@DrShikhaParmarClasses]

Assuming that you are clear with the concept of conducting velocity, effective refractrory period and reentry mechanism:
Within the ischemic block, the conduction velocity is reduced because of depolarization. When the action potential exits the block in forward direction, it finds the tissue outside the block unexcitable because effective refractory period has increased and thus the action potential dies away and impulse is blocked.
On the contrary, when the action potential exits the block in backward direction, it finds the tissue outside the block excitable and thus the action potential & impulse propagates in backwards direction.
Thus, timing is very important and the action potential exiting the ischemic block must find excitable tissue in order for the impulse to continue to propagate.

[@Vmanmeme]

@@DrShikhaParmarClassesmam one question
explain me
Why tissue outward is block is excitable for backward impulse and unexcitable for forward impulse???