Pressure changes during the cardiac cycle. P N L Atrial systole Ventricle systole Diastole.

Slides:

Advertisements

Similar presentations

Advertisements

5. Structure and Function of the Heart

Structure and Function

Prepared By, Mrs Yap-Wong Fui Yen (HKSS) Topic: Transport in Mammals( Part 1) At the end of lesson, you should be able to:  Identify the main blood vessels.

Is there a pressure difference? Is there an open valve? Where will blood flow? *atrium →ventricle *ventricle →atrium *ventricle →aorta *aorta →ventricle.

Structure and Function of the 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.

Starter labels…

The cardiac cycle Pressure and volume changes and associated valve movements during the cardiac cycle. Describing the sequence of events in one heart beat.

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

The Cardiac Cycle. Learning Outcomes During diastole blood returning to the atria flows into the ventricles. Atrial systole transfers the remainder of.

“Fun” Warm- Up Heart Brain Lungs Stomach Intestine Liver

bicuspid or mitral valve tricuspid valve semilunar aortic valve semilunar pulmonary valve.

 Have you ever thought about the sound you hear on a stethoscope. What is the “lub dub” sound?

Where Is Your Heart?. Circulation of blood Pulmonary circulation - Blood from heart to lungs and back again Systemic circulation – blood from heart to.

C ARDIAC C YCLE. E ARLY DIASTOLE Pressure in ventricles is low. Pressure difference causes A-V valves to open and the ventricles to fill. 70% of returning.

EKG Ventricular Pressure Aortic Pressure Ventricular Volume P Mm Hg ml A The P wave denotes atrial depolarization.

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)

Cardiac Conduction System. (1) Conduction System of Heart Conduction System = Heart Beat & Pumping Cardiac Contractions = Unconscious –Autonomic Nervous.

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

HEART PHYSIOLOGY. What a Job!  It pushes your six liters of blood through your blood vessels over 1000 times a day!  Thousands of cells function as.

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 Describing the sequence of events in one heart beat.

The Cardiac Cycle.

Function. Heart Action Systole: Contraction of the heart Diastole: Relaxation of the heart In what order does blood travel through the four chambers of.

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

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 Heart. HEART Main organ that moves blood through the body Pumps around 5 L/minute On average, pumps 75 years continuous It is about the size of a.

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.

The Cardiac Cycle. Systole – contraction Diastole – relaxation PLEASE SEE THE HANDOUT ON THE WIKI FOR DETAILS OF EACH STEP.

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.

Blood Pressure What is blood pressure? The pressure of blood against the walls of the blood vessels as it circulates around the body.

BASIC INTRODUCTION OF ANATOMY OF HEART

The Show. The Heart The heart is a bag of cardiac muscle filled with blood Has 4 chambers: 2 atria & 2 ventricles Right side contains oxygenated blood.

Review for Cardiovascular Quiz. What is the Name of the following Structures?

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.

Heart and Cardiac cycle

 Describe the cardiac cycle (how the heart beats)  Understand the relationship with changing pressures and the valve closures.

How The Heart Works.

Features of a good transport system

Cardiovascular System

BLOOD CIRCULATION Dr.Sisara Bandara Gunaherath MBBS.

Jocelyn Sassano & Sarah Miller

B – The Cardiovascular System

Mammalian circulation

Heart Conduction & Cardiac Cycle

Other topics today.. Page 192 pressure changes in cardiac cycle.

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

UNIT 3 NOTES: Cardiac Conduction System

Cardiac Conduction System

The Blood System.

Learning Objectives Key Words – Systole Diastole Title Cardiac Cycle

CARDIC CYCLE Dr. Haseeb Sattar.

Definitions Systole = period of ventricular contraction.

The cardiac cycle.

UNIT 2 NOTES: Cardiac Conduction System

Those Heartbeat Graphs

The Steps of The Cardiac Cycle

Introduction; The Cardiovascular System (CVS)

Presentation transcript:

Pressure changes during the cardiac cycle

P N L Atrial systole Ventricle systole Diastole

What is happening at L-M L: Ventricular systole starts Ventricular pressure greater than atrial pressure. Therefore AV valves shut. M: Ventricular systole Pressure in ventricle exceeds that in aorta Semilunar valves open Blood enters aorta.

What is happening and N and P N: Start of ventricular diastole Ventricular pressure less than aortic pressure Semilunar valves shut Preventing backflow of blood into ventricles P: Ventricular diastole Pressure in ventricle drops below atrium AV valves open Blood enters ventricle

Why is the max pressure in the left atrium lower than max pressure in the left ventricle? Ventricle has thicker muscle wall Generates a higher pressure as it contracts Pumps blood a greater distance then atria