Cardiac Cycle | Cardiology | Systole & Diastole | Cardiovascular🫀

#drnajeeb #cardiology #cardiaccycle #medicines #systolic #diastolic

Cardiac Cycle | Cardiology | Systole & Diastole | Cardiovascular🫀

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▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
00:00:00 Start
00:00:47 What Is Cardiac Cycle?
00:01:41 Events In Left Side Of Heart
00:07:49 Onset Of Ventricular Contraction
00:10:52 Closure Of Mitral Valve (First Heart Sound)
00:12:30 Isovolumetric Contraction
00:14:30 C Wave
00:18:30 Rapid Ventricular Ejection
00:22:49 V Wave
00:25:43 Slow Ventricular Ejection Phase
00:30:45 Isovolumetric Relaxation
00:35:10 Rapid Passive Ventricle Filling Phase
00:38:50 Slow Passive Filling Phase
00:42:12 Repetition Of Cycle
00:43:05 Time Od Systole And Diastole
00:45:30 Heart Sound During Cycle
00:49:55 Pressures In Multiple Vessels And Chambers
00:50:53 Q&A About S3 And S4
00:51:55 Graphical Representation Of Cardiac Cycle
00:52:26 Parameters
00:52:45 Atrial Contraction
00:57:06 Rapid Progressive Filling Phase
01:05:06 S3 Sound
01:05:22 Slow Progressive Filling Phase
01:05:38 S4 Sound
01:08:45 Ecg
01:10:30 Summary

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The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, dubbed systole. After emptying, the heart immediately relaxes and expands to receive another influx of blood returning from the lungs and other systems of the body, before again contracting to pump blood to the lungs and those systems. A normally performing heart must be fully expanded before it can efficiently pump again. Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle, or heartbeat, takes about 0.8 seconds to complete the cycle. There are two atrial and two ventricle chambers of the heart; they are paired as the left heart and the right heart—that is, the left atrium with the left ventricle, the right atrium with the right ventricle—and they work in concert to repeat the cardiac cycle continuously, (see cycle diagram at right margin). At the start of the cycle, during ventricular diastole–early, the heart relaxes and expands while receiving blood into both ventricles through both atria; then, near the end of ventricular diastole–late, the two atria begin to contract (atrial systole), and each atrium pumps blood into the ventricle below it. During ventricular systole the ventricles are contracting and vigorously pulsing (or ejecting) two separated blood supplies from the heart—one to the lungs and one to all other body organs and systems—while the two atria are relaxed (atrial diastole). This precise coordination ensures that blood is efficiently collected and circulated throughout the body.
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[sukhdanagpal]

Tomorrow is my physiology exam and i am so confident about cardiac cycle now thankyou sir 🙏 amazing explanation

[kwahi]

Such an impressive professor! Only certain people truly know how to "teach, " and this talented man is one of them!

[briannduati]

As a clinician and an echo tech this lecture was one of the most crucial in gaining understanding about cardiac physiology in terms of pressure, volume and time changes in a cardiac cycle. May the Lord Jesus bless you sir, and bless the work of your hands

[sadafmemon]

Literally the most best lecture on youtube of cardiac cycle .. ❤

[reuvenmeirherrera]

Wow, im a medical student and i NEEDED this type of "TEACHING Method" . Im a visual learner and the way you teach, DR. Najeeb, is extremly helpful for visual learner like myself. Thank you and G-d bless!

[ruthrogers]

Just learnt today the cardiac cycle and am a happy medical student from Kenya.. be blessed 🤗

[DoctorNajeeb]

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[rhythmnarang]

There has to be something racing up najeeb’s way of explanation, but its 2024 and I still can’t find anyone better !! Amazing Sir🙏🏻

[jhorapalok]

Sir... I'm not a medical student...but any way I fill with an unknown pleasure after watching your because I want to be a doctor, which is not possible for some reasons...
So your videos give me satisfaction... that.... though I'm not a doctor, but still I know lots of fact about human body
Thank you so much Sir😊🙏🙏

[Uniqueworld]

You're really one of the best medicine teacher of all the times, Love from India sir 🙏🙏🙏

[Little_Doctor]

Nobody has made Cardiac cycle this easy to me. Thank you very much sir. God bless you ❤️

[superdavid]

Its literally wonderful that understanding this concept took around more than hour but indeed heart cycle occurs in second. I love your performance Sir

[Ethereal_Queen]

I'm really grateful to have this lecture about Cardiac cycle. I was so confused about the pressure graphs before but You made it clear and perfect. All my doubts are clarified now. This is the best and neat lecture ever to watch and to understand. One hour lecture & Every second is worth it . Thank you Sir, means alot ❤️

[hameempromity]

Really u r such a professor who performs his job perfectly and that is making any student's conception absolutely clear about any concept.

[HUMZA]

Lucky are those student's who’s professor is dr najeeb sir

[farahdeeba]

Sir I met you in SIR GANGA RAM hospital Lahore! I was pretty much inspired by your story ! Sir I am your diehard fan! You are doing great job sir! Allah will surely pay you for this! May Allah give satisfaction to your WIFE """SHAMMA""" soul

[iloveharrypotter]

test tomorrow, watched this video and everything was explained beautifully in such a short time. Electrical and mechanical both shown on the diagram and explained succinctly was my personal favorite, much appreciated Dr. Najeeb!

[amitdhyani]

Finally i am able to understand my each heartbeat process😁✌️. Shukriya sir 😌

[medfreak]

sir, i have graduated but i was unable to get hold of this topic and suffered in various exams as well, today u have made it so easy as it was nothing :) thank you so much <3 u r such a blessing to our medical world <3

[baseedabdul]

Many years have passed and many things have changed, like technology, many platforms but your explanation will always helps to every student ... Thank you