Interactive heart - Mr Waring`s Biology Blog
... The electrical activity of the heart can be monitored by an electrocardiograph. Several electrodes are attached to specific places on a person’s chest and limbs. These detect changes in polarization in the heart by measuring current at the skin surface. The leads are connected to a machine that draw ...
... The electrical activity of the heart can be monitored by an electrocardiograph. Several electrodes are attached to specific places on a person’s chest and limbs. These detect changes in polarization in the heart by measuring current at the skin surface. The leads are connected to a machine that draw ...
The Heart - twynham a level pe
... The electrical activity of the heart can be monitored by an electrocardiograph. Several electrodes are attached to specific places on a person’s chest and limbs. These detect changes in polarization in the heart by measuring current at the skin surface. The leads are connected to a machine that draw ...
... The electrical activity of the heart can be monitored by an electrocardiograph. Several electrodes are attached to specific places on a person’s chest and limbs. These detect changes in polarization in the heart by measuring current at the skin surface. The leads are connected to a machine that draw ...
Patent Ductus Arteriosis - Nicole Stevens
... has a higher affinity for oxygen (doesn’t release it as easily) The lower the gestational age the greater the risk of PDA VLBW infants will have up to 50 – 60% chance of a PDA ...
... has a higher affinity for oxygen (doesn’t release it as easily) The lower the gestational age the greater the risk of PDA VLBW infants will have up to 50 – 60% chance of a PDA ...
Section 12.1 - Kalaheo High School
... • Think of your cardiovascular system as a network of blood vessels with two major loops. • The first loop leads from your heart to your lungs. • The second loop circles through to the rest of your body. • Each time the heart beats, strong cardiac muscles push blood through the blood vessels. ...
... • Think of your cardiovascular system as a network of blood vessels with two major loops. • The first loop leads from your heart to your lungs. • The second loop circles through to the rest of your body. • Each time the heart beats, strong cardiac muscles push blood through the blood vessels. ...
Circulatory system - physicsinfo.co.uk
... body muscles surround the veins so that when they contract to move the body, they also squeeze the veins and push the blood along the vessel. ...
... body muscles surround the veins so that when they contract to move the body, they also squeeze the veins and push the blood along the vessel. ...
Chapter V Thorax
... l It is also increased as pressing the stethoscope firmly against the patient’s chest wall. l A rub may be readily heard at one moment and be absent several minutes later. l The intensity of the rub is usually increased when the subject is sitting upright and leaning ...
... l It is also increased as pressing the stethoscope firmly against the patient’s chest wall. l A rub may be readily heard at one moment and be absent several minutes later. l The intensity of the rub is usually increased when the subject is sitting upright and leaning ...
The Heart
... body muscles surround the veins so that when they contract to move the body, they also squeeze the veins and push the blood along the vessel. ...
... body muscles surround the veins so that when they contract to move the body, they also squeeze the veins and push the blood along the vessel. ...
A2-Cardiac Anatomy
... • QT interval represents the total time required for depolarization and repolarization of the ventricles, and extends from the beginning of the Q wave to the end of the T wave • The QT interval varies with heart rate therefore the QTc is calculated = QT/ (√R-R in seconds) • QT prolongation: increase ...
... • QT interval represents the total time required for depolarization and repolarization of the ventricles, and extends from the beginning of the Q wave to the end of the T wave • The QT interval varies with heart rate therefore the QTc is calculated = QT/ (√R-R in seconds) • QT prolongation: increase ...
Final heart development
... • The two ends of the septum primum reach to the growing endocardial cushions before its central part. • So the septum primum bounds a foramen called ostium primum. • It serves as a shunt, enabling the oxygenated blood to pass from right to left atrium. • The ostium primum become smaller and disapp ...
... • The two ends of the septum primum reach to the growing endocardial cushions before its central part. • So the septum primum bounds a foramen called ostium primum. • It serves as a shunt, enabling the oxygenated blood to pass from right to left atrium. • The ostium primum become smaller and disapp ...
Cardiovascular System: The Heart
... S3 is due to blood turbulence from rapid ventricular filling. S4 is due to blood turbulence during atrial systole. S3 and S4 are not normally heard. ...
... S3 is due to blood turbulence from rapid ventricular filling. S4 is due to blood turbulence during atrial systole. S3 and S4 are not normally heard. ...
“Dyspnea” A Cardiologist Perspective
... 62 year old white female with a history of hypertension, hyperlipidemia, mild obesity (BMI of 31) and remote tobacco use (1/2 pack per year for ten years but quit at age of 30) presents as a new patient as she has recently moved to Maine for retirement. You are her third primary care physician in tw ...
... 62 year old white female with a history of hypertension, hyperlipidemia, mild obesity (BMI of 31) and remote tobacco use (1/2 pack per year for ten years but quit at age of 30) presents as a new patient as she has recently moved to Maine for retirement. You are her third primary care physician in tw ...
Current and Novel Devices in Structural Heart Disease
... and congenital cardiac conditions as well as acquired valvular abnormalities. Transcatheter treatment offers advantages over surgical intervention in recovery time, improved patient satisfaction, lower procedural risk and avoidance of cardio-pulmonary bypass especially in high-risk patients. With op ...
... and congenital cardiac conditions as well as acquired valvular abnormalities. Transcatheter treatment offers advantages over surgical intervention in recovery time, improved patient satisfaction, lower procedural risk and avoidance of cardio-pulmonary bypass especially in high-risk patients. With op ...
Ventricular Septal Defects
... make sure that the hole eventually closes properly and signs of heart failure do not occur. Large VSD: who have symptoms related to heart failure may need medicine to control the symptoms and surgery to close the hole. Medications may include digoxin and diuretics. If symptoms continue, even with me ...
... make sure that the hole eventually closes properly and signs of heart failure do not occur. Large VSD: who have symptoms related to heart failure may need medicine to control the symptoms and surgery to close the hole. Medications may include digoxin and diuretics. If symptoms continue, even with me ...
Cardiovascular System: The Heart
... Reperfusion damages the tissue further due to the formation of oxygen free radicals from the reintroduced oxygen. ...
... Reperfusion damages the tissue further due to the formation of oxygen free radicals from the reintroduced oxygen. ...
Cardiovascular System: The Heart
... Reperfusion damages the tissue further due to the formation of oxygen free radicals from the reintroduced oxygen. ...
... Reperfusion damages the tissue further due to the formation of oxygen free radicals from the reintroduced oxygen. ...
The Circulatory and Respiratory System
... heart. It is then pumped by the heart into your blood stream. Figure 1.2 shows the flow of oxygen and carbon dioxide pumped to the body. Blood travels throughout your body. The heart pumps blood through a system of large and small pathways that make up the circulatory system. Blood delivers vital nu ...
... heart. It is then pumped by the heart into your blood stream. Figure 1.2 shows the flow of oxygen and carbon dioxide pumped to the body. Blood travels throughout your body. The heart pumps blood through a system of large and small pathways that make up the circulatory system. Blood delivers vital nu ...
The Circulatory System. - PhysicalEducationatMSC
... ventricles contracting. In arteries it fluctuates with each heart beat. The higher pressure (systolic) occurs when the ventricles contract. The lower pressure (diastolic) occurs when the ventricles relax. Blood pressure is usually described by these two limits Average blood pressure is 120/80mmHg ...
... ventricles contracting. In arteries it fluctuates with each heart beat. The higher pressure (systolic) occurs when the ventricles contract. The lower pressure (diastolic) occurs when the ventricles relax. Blood pressure is usually described by these two limits Average blood pressure is 120/80mmHg ...
Post-Operative Care of the Pediatric Heart Surgery Patient
... Who needs afterload reduction? • Decreases force against which heart has to contract • Particularly needed for patients with aortic insufficiency or mitral regurgitation – Can help to decrease the amount of regurgitation ...
... Who needs afterload reduction? • Decreases force against which heart has to contract • Particularly needed for patients with aortic insufficiency or mitral regurgitation – Can help to decrease the amount of regurgitation ...
Slide 1
... • Approximately 4.9 million cases in the United States today • Over 400,000 new cases per year • The most common cause of hospitalization in people over 65 years • Increasing numbers of CHF patients due to the aging population ...
... • Approximately 4.9 million cases in the United States today • Over 400,000 new cases per year • The most common cause of hospitalization in people over 65 years • Increasing numbers of CHF patients due to the aging population ...
hemodynamics (blood flow, pressure and resistance)
... • Adding a resistor in series will decrease the resistance of the system • The flow of blood in the systemic circuit is in parallel, so altering the resistance at any INDIVIDUAL point in this circuit will : – Decrease total peripheral resistance – Not change the flow in the remaining circuits ...
... • Adding a resistor in series will decrease the resistance of the system • The flow of blood in the systemic circuit is in parallel, so altering the resistance at any INDIVIDUAL point in this circuit will : – Decrease total peripheral resistance – Not change the flow in the remaining circuits ...
Pulmonary Circulation
... through its walls • Blood Pressure: force exerted on vessel walls by blood when the heart pumps through the cardiovascular system; normally 120/80 for a young adult • Atherosclerosis: Cardiovascular condition resulting from fatty deposits on arterial walls, which can clog blood vessels ad interfere ...
... through its walls • Blood Pressure: force exerted on vessel walls by blood when the heart pumps through the cardiovascular system; normally 120/80 for a young adult • Atherosclerosis: Cardiovascular condition resulting from fatty deposits on arterial walls, which can clog blood vessels ad interfere ...
9 Cardiology
... To the right and anterior in a neonate and gradually moves round to the left and posterior (as in adults) by teenage years Vary with age (see Table 9.1) Normal splitting of the second heart sound (A2 P2) on expiration is audible in children and young adults A third heart sound (S3) can be normal in ...
... To the right and anterior in a neonate and gradually moves round to the left and posterior (as in adults) by teenage years Vary with age (see Table 9.1) Normal splitting of the second heart sound (A2 P2) on expiration is audible in children and young adults A third heart sound (S3) can be normal in ...
Heart - lwthspn
... Each cell is bathed in electrolytes : Inside & out Resting cell has negative charge & Is called polarized ...
... Each cell is bathed in electrolytes : Inside & out Resting cell has negative charge & Is called polarized ...
Lown-Ganong-Levine Syndrome
... The history is of bouts of tachycardia that may present as rapid palpitations. It most often starts in early adulthood but can present in childhood. It tends to get less frequent with passing years. In the otherwise healthy person there is probably no other feature but, where the heart and circulati ...
... The history is of bouts of tachycardia that may present as rapid palpitations. It most often starts in early adulthood but can present in childhood. It tends to get less frequent with passing years. In the otherwise healthy person there is probably no other feature but, where the heart and circulati ...
Lutembacher's syndrome
Lutembacher's syndrome is a form of congenital heart disease. Lutembacher's syndrome was first described by a French cardiologist by the name of Rene' Lutembacher (1884–1968) of Paris, France in 1916. Lutembacher syndrome is a rare disease that affects one of the chambers of the heart as well as a valve of the heart. Lutembacher's syndrome is known to affect females more often than males. Lutembacher is an extremely rare disease. Lutembacher's can affect children or adults; the person can either be born with the disorder or develop it later in life.Lutembacher affects more specifically the atria of the heart and the mitral or biscupid valve. The disorder itself is known more specifically as both congenital atrial septal defect (ASD) and acquired mitral stenosis (MS). Congenital (at birth) atrial septal defect refers to a hole being in the septum or wall that separates the two atria; this condition is usually seen in fetuses and infants. Mitral stenosis refers to mitral valve leaflets (or valve flaps) sticking to each other making the opening for blood to pass from the atrium to the ventricles very small. With the valve being so small, blood has difficulty passing through the left atrium into the left ventricle. There are several types of septal defects that may occur with Lutembacher's syndrome: ASD Ostium Secundum or ASD (Primium); Ostium Secundum is the most prevalent.Lutembacher is caused indirectly as the result of heart damage or disorders and not something that is necessarily infectious. Lutembacher's syndrome is caused by either birth defects where the heart fails to close all holes in the walls between the atria or from an episode of rheumatic fever where damage is done to the heart valves such as the mitral valve and resultant in an opening of heart wall between atria. With Lutembacher's syndrome, a fetus or infant is usually seen to have a hole in their heart wall (interatrial) separating their right and left atria. Normally during fetal development, blood bypasses the lungs and is oxygenated from the placenta. Blood passes from the umbilical cord and flows into the left atrium through an opening called the foramen ovale; the formaen ovale is a hole between the two atria. Once a baby is born and the lungs begin to fill with air and the blood flow of the heart changes, a tissue flap (somewhat like a trap door) called the septum primium closes the foramen ovale or hole between the two atria and becomes part of the atrial wall. The failure of the hole between the two atria to close after birth leads to a disorder called ASD primium. The most common problems with an opening found in the heart with Lutembacher's syndrome is Ostium Secundum. Ostium Secundum is a hole that is found within the flap of tissue (septum primium) that will eventually close the hole between the two atria after birth. With either type of ASD, ASD will usually cause the blood flow from the right atrium to skip going to the right ventricle and instead flow to the left atrium. If mitral stenosis (the hardening of flap of tissue known as a valve which opens and closes between the left atrium and ventricle to control blood flow) is also present, blood will flow into the right atrium through the hole between the atria wall instead of flowing into the left ventricle and systemic circulation. Eventually this leads to other problems such as the right ventricle failing and a reduced blood flow to the left ventricle.In addition to the ASD, acquired MS can be present either from an episode of rheumatic fever (the mother has or had rheumatic fever during the pregnancy) or the child being born with the disorder (congenital MS). With the combination of both ASD and MS, the heart can be under severe strain as it tries to move blood throughout the heart and lungs. To correct Lutembacher's syndrome, surgery is often done. There are several types of surgeries depending on the cause of Lutembacher's syndrome(ASD Primium or ASD Ostium Secundum with Mitral Stenosis): Suturing (stitching) or placing a patch of tissue (similar to skin grafting) over the hole to completely close the opening Reconstructing of the mitral and tricuspid valve while patching any holes in the heart Device closure of ASD (e.g. Amplatzer umbrella or CardioSEAL to seal the hole Percutaneous transcatheter therapy Transcatheter therapy of balloon valvuloplasty to correct MS↑ ↑ 2.0 2.1 2.2 2.3 2.4 ↑ 3.0 3.1 3.2 3.3 3.4 ↑ ↑ ↑ 6.0 6.1 6.2 6.3 ↑