DR. ZAHOOR ALI SHAIKH CARDIOVASCULAR SYSTEM LECTURE - VII.

Slides:

Advertisements

Similar presentations

CARDIOVASCULAR SYSTEM CARDIAC CYCLE HEART SOUNDS

Advertisements

1. CARDIOVASCULAR SYSTEM CARDIAC CYCLE HEART SOUNDS LECTURE – 4 DR. ZAHOOR ALI SHAIKH 2.

Associated Prof. of physiology

DR. ZAHOOR ALI SHAIKH CARDIOVASCULAR SYSTEM LECTURE - VII.

Twelfth lecture Pressure pulses in the cardiac chamber and related vessels. The heart beat in a rate of about /min. At the beginning of the cardiac.

Cvs module phase II MBBS CARDIAC CYCLE PHYSIOLOGY CARDIOVASCULAR MODULE PHASE II

ELECTRICAL & MECHANICAL ACTIVITY IN THE MAMMALIAN HEART.

The Cardiac Cycle Refers to the events of 1 complete heart beat – Both atria & ventricles contract then relax (0.8 sec if beating 75x/min) Key terms to.

THE CARDIAC CYCLE.

20.18 The Cardiac Cycle Slide number 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. AV valves opened Semilunar.

HEART PHYSIOLOGY & CONDUCTION SYSTEM

Circuits Chambers Valves (one-way-flow) Myocardiocytes The Heart.

The Cardiovascular System: The Heart Lab 4. Cardiac Muscle Contraction Heart muscle: –Is stimulated by nerves and is self-excitable (automaticity) –Contracts.

Human Anatomy & Physiology FIFTH EDITION Elaine N. Marieb PowerPoint ® Lecture Slide Presentation by Vince Austin Copyright © 2003 Pearson Education, Inc.

Lecture 11.2 Heart Physiology. Conduction System of the Heart Intrinsic/Nodal System: spontaneous, independent of nervous system Causes heart muscle depolarize.

Chapter 15.4: Electrocardiogram

Cardiac cycle Dr. shafali singh.

Learning Objectives... To understand the stages of the cardiac cycle.

The Cardiac Cycle. The repeating pattern of contraction (systole) and relaxation (diastole) of the heart The repeating pattern of contraction (systole)

The Steps of The Cardiac Cycle “The Rhythm is gonna get you”

HEART SOUNDS Dr. Taj. HEART SOUNDS Dr. Taj There are four heart sounds SI, S2, S3 & S4. Two heart sound are audible with stethoscope S1 & S2 (Lub -

Cardiac Cycle Dr. Wasif Haq. Introduction Cardiac events that occur from beginning of one heartbeat to the beginning of the next. Inversely proportional.

The Cardiac Cycle.

The cardiovascular system in action 1/Cardiac function and cardiac output 2/ Cardiac cycle.

Circuits Chambers Valves (one-way-flow) Myocardiocytes The Heart.

Heart Beat and Blood Pressure. Heart Beat Animation ions/ ions/

The Cardiac Cycle.  0.0 – 0.05 seconds: Atrial depolarisation: a wave of depolarisation spreads over the atria from the Sino Atrial Node initiating the.

The Cardiac Cycle. The repeating pattern of contraction (systole) and relaxation (diastole) of the heart The repeating pattern of contraction (systole)

The cardiac cycle Ventricular filling the diastole refers to the period of the cardiac cycle during which the ventricles are filling with blood the systole.

Circulatory System How does the heart work? Heart beat Motor nerve Skeletal muscle The heart is myogenic  Generates its own electricity.

Series of events that constitute a complete heartbeat

Cardiac Cycle  Refers to pattern of ;  Systole (contraction)  Diastole (relaxation)  Shown by the heart in one complete cycle  On average this 1.

PHYSIOLOGY OF THE HEART NOTES. Cardiac Conduction System SA node - (pacemaker) sinoatrial AV node – atrioventricular AV bundle Initiate and distribute.

Events of the Cardiac Cycle Why did the blood flow across the valve? Desire - it wanted to Ability - it could do it Movement = Desire X Ability Flow.

BASIC INTRODUCTION OF ANATOMY OF HEART

CARDIO-VASCULAR SYSTEM – Part 2 Jony Mallik B. Pharmacy; M. Pharmacy

Cardiac Cycle By Dr. Khaled Ibrahim Khalil By Objectives: By the end of this lecture, you should : By the end of this lecture, you should :  Describe.

1. LECTURE – 3 DR. ZAHOOR ALI SHAIKH 2 CARDIAC CYCLE  Cardiac events occurring during one beat (systole & diastole) are repeated during the next beat.

3.1.5 Pressure and Volume Changes in the Heart L.O: to interpret graphs on the cardiac cycle Starter: What animal has the highest blood pressure in the.

Cardiovascular System Chapter 11. Conduction System Intrinsic conduction system (nodal system)

Cardiac Cycle- 1 Mechanical events, Volume & Pressure changes in cardiac chambers & the great vessels during the cardiac cycle.

“Pump work of heart. Echocardiography”. Cardiac cycle Systole of atrium Systole of ventricles Діастола передсердь Діастола шлуночків.

Heart and Cardiac cycle

July 16 1 The cardiac cycle July 16 2 The cardiac cycle The cardiac events that occur from the beginning of one heartbeat to the beginning of the other.

2. Systole: Period of ejection. Continued ventricular

Cardiac Cycle and Sounds

Heart Function – Cardiac Cycle and the Electrocardiogram (ECG)

Выполнил Финк Эдуард Студент 182 группы ОМ

Head of Medical Department Tuanku Fawziah Hospital

Jocelyn Sassano & Sarah Miller

Cardiovascular Physiology

Heart as a pump. Echocardiography

The Cardiovascular System: The Heart Physiology

Dr. Arun Goel Associate professor Department of Physiology

Contents The Anatomy of the Heart The Cardiac Cycle: Diagrams 1-14

Lecture 1A. Part 1 The HEART and Cardiac Cycle Holdorf RVT

What do I remember? What is the structure of the heart?

THE HEART TWO PUMPS BEAT AS ONE….

Cardiac Conduction System

The Heart Circuits Chambers Valves (one-way-flow) Myocardiocytes.

Cardiovascular system- L3

Electrocardiogram Lab Concepts

CARDIC CYCLE Dr. Haseeb Sattar.

The cardiac cycle.

The heart’s physiology

Dr. Amin Jan Assistant Professor (Physiology) NwSM, Peshawar Pakistan Cardiac cycle.

The Steps of The Cardiac Cycle

Presentation transcript:

DR. ZAHOOR ALI SHAIKH CARDIOVASCULAR SYSTEM LECTURE - VII

CARDIAC CYCLE

Cardiac events occurring during one beat (systole & diastole) are repeated during the next beat Cardiac cycle time : 0.8 second when heart rate is 75 beats per minute.

We will discuss mechanical & electrical changes during Cardiac Cycle Mechanical changes: 1.Phases of cardiac cycle 2.Heart sounds 3.Pressure changes during cardiac cycle 4.Volume changes during cardiac cycle Electrical Changes 5.Electrocardiogram (ECG)

PHASES OF CARDIAC CYCLE

Atrial systole: 0.1 second Atrial diastole : 0.7 seconds  Ventricular systole : 0.3 seconds  Ventricular diastole : 0.5 seconds

Ventricular events Ventricular systole 1.Isovolumetric contraction 2.Ejection phase Rapid ejection Slow ejection Protodiastolic phase Ventricular Diastole 1.Isovolumetric relaxation phase 2.Filling phase Rapid filling Slow filling Last rapid filling

Q: Which Valves are open/closed during Isovolumetric contraction phase of cardiac cycle? A:All Valves are closed (AV valves & Semilunar Valves)

Q:Time for ventricular systole? A:0.3 Sec Q: Time for Ventricular Diastole? A: 0.5 Sec Q:Time for Cardiac Cycle? A: 0.8 Sec