Podcast21-Fetal Circulation-Leigha and Drew.MP3

Heart attack
Also called: myocardial infarction

Older man clutching at his chest, experiencing pain and tightness. Close-up of a blocked coronary artery and muscle affected by lack of blood supply in the heart.

 stroke is when a blood vessel that brings oxygen and nutrients to the brain is either blocked by a clot (an ischemic stroke), or it ruptures (a hemorrhagic stroke), which cuts off the vital blood and oxygen flow to that part of the brain.
***The Right side of the brain controls the left side of the body and vice versa...so a Right side of brain stroke affects the left side of the body-Memorize mnemonic below!

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Also called: CVA, cerebrovascular accident
Man experiencing signs of a stroke, including muscle weakness on one side of his body, facial drooping, and speech difficulties.

HEPATIC(Liver) circulation-text p. 392...
***Video from today.https://youtu.be/zTXmaVgobNw

Oxygen diffuses from maternal blood to fetal blood through the placenta. Within the womb, the lungs are not able to work properly and so blood is rerouted through the foramen ovale and the ductus arteriosus. The liver is also underdeveloped, and not ready to perform the functions it will do in adulthood. The placenta takes over for the liver during gestation, and so blood is shunted away from the liver by the ductus venosus. This prevents oxygen that could be useful in other places from being wasted in the liver.

Fetal Circulation Before Birth...

Fetal Circulation After Birth...

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  • Dissection Forceps.***
  • Dissection Needles.***
  • Dissecting Pans & Pads.***
  • Dissecting Probes.***
  • Dissecting Scissors.***
  • Dissection Sets.
  • Scalpels & Blades.***
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Dissection WS is above...
HW: Ch 11 Summative test tomorrow...


***Above is the Sheep Heart Dissection WS for Thursday...

2916 Fetal Circulatory System-02.jpg

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Palpating Brachial Pulse
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Palpating Radial Pulse
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Thursday-2/28...CW: Blood Pressure...
***How to perform B/P measurement...
***Pre-Quiz on how to read the dial of measurements...
***Hypertension-140/90 is the 'silent killer'
***Only 'EVEN' measurements-NEVER ODD in mm Hg(Mercury)...Be familiar with this dial...
***Korotkoff sounds are blood flow sounds that healthcare providers observe while taking blood pressure with a sphygmomanometer over the brachial artery in the antecubital fossa. These sounds appear and disappear as the blood pressure cuff is inflated and deflated..
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  1. To begin blood pressure measurement, use a properly sized blood pressure cuff. ...
  2. Wrap the cuff around the upper arm with the cuff's lower edge one inch above the antecubital fossa.
  3. Lightly press the stethoscope's bell over the brachial artery just below the cuff's edge. ...
  4. Rapidly inflate the cuff to 180mmHg.
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You must know how to use it safely...No Horseplay...SILENCE IS GOLDEN!
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EKG(ECG in England)...text p. 377-380...

***Key Vocabulary:
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract(heart strings)

Heart Conduction System-Text p. 376-380...

EKG(ECG in UK)...Text p.377-378...
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EKG Waveform

ekg waveform component names

The P Wave

The first deflection is the P wave associated with right and left atrial depolarization

The QRS Complex

Typically this complex has a series of 3 deflections that reflect the current associated with right and left ventricular depolarization

The T Wave

The T wave represents the current of  ventricular repolarization

***Depolarization = contraction = systole...

***Repolarization = resting = diastole...

Normal Sinus Rhythm- 60-80bpmImage result for normal sinus rhythm

Sinus Bradycardia-less than 60 bpm
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Sinus Tachycardia-greater than 100 bpm
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Ventricular fibrillation (V-fib )... is when the heart quivers instead of pumping due to disorganized electrical activity in the ventricles.

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Asystole(remember prefix a = without)= 'Flatline'

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 Arrhythmias--Sinus bradycardia, tachycardia, v fib, asystole...
 How to Palpate a radial and brachial pulse...only these 2 pulses!!
***Pulse videos from today...https://youtu.be/vmVjnpTv_Nk
***Observing a student violate class policy or teacher directions  by performing Carotid pulse or any not instructed to perform will be subject to immediate discipline and a zero grade! You may severely injure a student!...

***Widowmaker...Know this! Left AnteriorDescending Artery...
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***Coronary arteries supply O2 and blood supply to the myocardium and septum of heart.

Your Coronary Arteries

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Podcast 20-Katman's Blood flow through the heart.MP3

Video link from today...https://youtu.be/-4kGMI-qQ3I
***Cardiac Cycle: text p. 372...The cardiac cycle is the sequence of events that occurs when the heart beats. ... In the systole phase, the ventricles contract and pump blood out of the heart and to arteries.Relaxation is Diastole... One cardiac cycle is completed when the heart chambers fill with blood and blood is then pumped out of the heart.
***lubb-dupp (lub-dup)  a representation of the normal heart sounds as heard through the stethoscope. The first coincides with closure of the mitral and tricuspid valves; the second with closure of the aortic and pulmonary valves.

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***Cardiac Output: Text p. 373...the product of the heart rate (HR), or the number of heart beats per minute (bpm), and the stroke volume (SV), which is the volume of blood pumped from the ventricle per beat; thus, CO = HR × SV. Values for cardiac output are usually denoted as L/min.

Sample problem: If Jenny has a resting heart rate of 60 beats per minute and a stroke volume of 70mL, what is her cardiac output?

***Myocardial Infarction = M.I. -a heart attack where myocardium heart muscle is starved of O2 so it develops an 'infarction'...an obstruction of blood supply...

***The cardiac output is simply the amount of blood pumped by the heart per minute. Necessarily, the cardiac output is the product of the heart rate, which is the number of beats per minute, and the stroke volume, which is amount pumped per beat. CO = HR X SV. The cardiac output is usually expressed in liters/minute. If given the Hr and need to find stroke volume, you do as always in math...reconfigure the formula for CO/HR = SV.
***normal adult has a cardiac output of 4.7 liters (5 quarts) of blood per minute.

Here’s an example:
If a patient's stroke volume is 75 mL with each contraction and his heart rate is 60 beats/minute, his cardiac output is 4,500 mL/minute (or 4.5 L/minute).



***This content is more rigorous than usual...

Here is the bloodflow video from today...

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CV system intro video notes (2).docx CV system intro video notes (2).docx
Size : 235.709 Kb
Type : docx

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Test your knowledge with the following quiz...
Look for poor English or grammar with singular and plural Katman tips...this is NOT for turning in......

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***The pericardium is a membrane 'around' the heart.
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***Coronary circulation is the circulation of blood in the blood vessels that supply the heart muscle (myocardium). Coronary arteries supply oxygenated blood to the heart muscle, and cardiac veins drain away the blood once it has been deoxygenated.

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**Heart Valves: Mitral is on left(letter L and M close together)
Mitral = Bicuspid...2 flaps or cusps vs 3 in Tricuspid...
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Intro to CV system video from today-https://youtu.be/_lgd03h3te8


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