Presentation on theme: "Heart. A large muscle which pumps blood throughout the body."— Presentation transcript:
A large muscle which pumps blood throughout the body
1. Chambers- 4 A. Upper: right and left atria Right-receives de-oxygenated blood from body Left- receives oxygenated blood from lungs
B. Lower: Right and Left Ventricle Right-pumps blood into lungs Left- pumps blood to the body
2. Valves- 4 A. Diastole: Relaxes 1. tricuspid valve-regulates blood flow between Right Atrium (RA) and Right Ventricle (RV) 2. Mitral Valve- lets Oxygen rich blood from your lungs pass from LA to LV
B. Systole: Contraction 1. Pulmonary valve - Controls blood flow from rv into pulmonary arteries go to lungs for O 2 2. Aortic valve - Opens the way for rich blood to pass from LV into aorta.
A. Right side O 2 to get more O 2. B. Left side – receives O 2 rich blood and pumps to whole body. 3. Double Pump- pumps oxygenated & deoxygenated blood (2)
HEART BEAT vital sign calculated in “bpm” males 70 bpm females 75 bpm newborn-1303 years months years year- 125adult
A. Heart Rate Abnormalities 1. Tachycardia: rapid beating of the heart 2. Bradycardia: slow beating of the heart – heart rate under 60 bpm
B. Target Heart Rate: Desired range of heart rate reached during aerobic exercise. Age Target HR Zone 50–85 % Average Maximum Heart Rate 100 % 20 years100–170 beats per minute200 beats per minute 25 years98–166 beats per minute195 beats per minute 30 years95–162 beats per minute190 beats per minute 35 years93–157 beats per minute185 beats per minute 40 years90–153 beats per minute180 beats per minute 45 years88–149 beats per minute175 beats per minute 50 years85–145 beats per minute170 beats per minute 55 years83–140 beats per minute165 beats per minute 60 years80–136 beats per minute160 beats per minute 65 years78–132 beats per minute155 beats per minute 70 years75–128 beats per minute150 beats per minute
Heart Sounds LUB-S1: Block reverse blood flow due to closure of atroventricular valves (mitral, tricuspid) DUPP-S2: sudden block of reversing blood flow due to closure of aortic and pulmonary valves.
Heart Sounds heartbeat
Heart Mumors Abnormal sounds due to a turbulaet flow of blood Causes: blood flowing faster increase in blood illnesses (fever, anemia)
2. Control of Heartbeat – 2 nodes A. SA (sinoatrial) node: “pacemaker”- controls the frequency at which the heart beats, inside RA and flows over both atriums.
B. AV (atrioventricular) node: picks up impulse from SA and flows down the septum to carry the impulse over each of the ventricles.
EKG (electrocardiogram) the tracing of the hearts electrical activity. Help diagnose arrhythmias.
3 types of waves 1. P wave: records electrical activity of atria 2. QRS wave: records electrical activity of ventricles 3. T wave: records the hearts return to rest
Pulse: “heart rate”-rate at which your heart beats. Pulse is what you feel over an artery as the pressure inside increases following each heart beat.
Blood Pressure refers to the force exerted by circulating blood on the walls of blood vessels Measurement: Can be measured invasively (by penetrating the skin and measuring inside the blood vessels) or non-invasively
1. Systolic Pressure: maximum pressure in an artery-beating and pumping 2. Diastolic Pressure: is the lowest pressure in an artery-resting
Why might a solider standing at attention for a long period of time faint? If the leg muscles are not used, blood is not pumped back to the heart. As a result, blood pools in the leg veins, and blood pressure falls