Catheter ablation of typiCal atrial flutter
... ECG for the “sawtooth pattern” of the flutter waves with negative polarity in the inferior leads (II, III and aVF) (figure 1) whereas CW AFL shows a positive polarity (figure 2). An additional criteria is to measure the ratio between the voltage in aVF and lead I: aVF/ lead I ratio of the flutter wa ...
... ECG for the “sawtooth pattern” of the flutter waves with negative polarity in the inferior leads (II, III and aVF) (figure 1) whereas CW AFL shows a positive polarity (figure 2). An additional criteria is to measure the ratio between the voltage in aVF and lead I: aVF/ lead I ratio of the flutter wa ...
Straddling tricuspid valve - Heart
... the inverted left ventricle. Further details in circulation depend upon the great vessel-ventricular relations. Clinically, the patients presented with cyanosis when pulmonary stenosis was present and with congestive cardiac failure when pulmonary stenosis was absent. The electrocardiogram is helpfu ...
... the inverted left ventricle. Further details in circulation depend upon the great vessel-ventricular relations. Clinically, the patients presented with cyanosis when pulmonary stenosis was present and with congestive cardiac failure when pulmonary stenosis was absent. The electrocardiogram is helpfu ...
The Hemodynamics of Calcific Aortic Valve Disease
... Calcific aortic valve disease (CAVD) causes a significant human and economic burden in both developed and developing countries and is now recognized as an important worldwide public-health problem. The prevalence of CAVD in the western world correlates with age and affects 26% of the population abov ...
... Calcific aortic valve disease (CAVD) causes a significant human and economic burden in both developed and developing countries and is now recognized as an important worldwide public-health problem. The prevalence of CAVD in the western world correlates with age and affects 26% of the population abov ...
Hypertrophic Cardiomyopathy - Pathophysiology
... leaflet or the chordal structures inserting on this leaflet being pulled into the LVOT during systole by the enlarged papillary muscles. Here it is caught in the blood flow and pushed toward and often ultimately against the interventricular septum. The initial pulling of the mitral valve leaflet tow ...
... leaflet or the chordal structures inserting on this leaflet being pulled into the LVOT during systole by the enlarged papillary muscles. Here it is caught in the blood flow and pushed toward and often ultimately against the interventricular septum. The initial pulling of the mitral valve leaflet tow ...
The right ventricle in patients with chronic heart failure and atrial
... chronic LV failure increases the risk of AF development. Weakened RV function was one of the strongest predictors of AF occurrence. Two thirds of AF cases occurred in patients with RV dysfunction. Moreover, patients with RV dysfunction had higher risk of cardiac readmission and mortality than contro ...
... chronic LV failure increases the risk of AF development. Weakened RV function was one of the strongest predictors of AF occurrence. Two thirds of AF cases occurred in patients with RV dysfunction. Moreover, patients with RV dysfunction had higher risk of cardiac readmission and mortality than contro ...
FETAL PHYSIOLOGICAL DEVELOPMENT
... • Ventricles of the fetal heart work in parallel compared to the adult heart which works in sequence. ...
... • Ventricles of the fetal heart work in parallel compared to the adult heart which works in sequence. ...
Failure of pulmonary artery banding due to migration of the
... ing a normal delivery. She was subject to recurrent and a pulmonary artery diameter of 3 cm. Digital attacks of 'pneumonia'. exploration from the right atrium confirmed a large She was referred to out-patients on 20 October ventricular septal defect, approximately 15 cm. in 1961 aged 15 months with ...
... ing a normal delivery. She was subject to recurrent and a pulmonary artery diameter of 3 cm. Digital attacks of 'pneumonia'. exploration from the right atrium confirmed a large She was referred to out-patients on 20 October ventricular septal defect, approximately 15 cm. in 1961 aged 15 months with ...
Right Ventricular Failure in Idiopathic Pulmonary Arterial - VU-dare
... Background—In idiopathic pulmonary arterial hypertension (IPAH), increased right ventricular (RV) power is required to maintain cardiac output. For this, RV O2 consumption (MVO2) must increase by augmentation of O2 supply and/or improvement of mechanical efficiency–ratio of power output to MVO2. In ...
... Background—In idiopathic pulmonary arterial hypertension (IPAH), increased right ventricular (RV) power is required to maintain cardiac output. For this, RV O2 consumption (MVO2) must increase by augmentation of O2 supply and/or improvement of mechanical efficiency–ratio of power output to MVO2. In ...
Frog Heart Physiology
... Nervous control of the heart is primarily regulated by medulla of the brain, and the heart is innervated by both sympathetic and parasympathetic nerve fibers that terminate at the SA node. The neurotransmitters released by these nerves affect both heart rate (chronotropic effects; chronos = time) an ...
... Nervous control of the heart is primarily regulated by medulla of the brain, and the heart is innervated by both sympathetic and parasympathetic nerve fibers that terminate at the SA node. The neurotransmitters released by these nerves affect both heart rate (chronotropic effects; chronos = time) an ...
The Cardiovascular System - Florida International University
... heartbeat During the cardiac cycle, pressure changes occur as the atria and ventricles alternately contract and relax When a chamber of the heart contracts, there is an increase in blood pressure inside the chamber When a chamber of the heart relaxes, there is a decrease in blood pressure insi ...
... heartbeat During the cardiac cycle, pressure changes occur as the atria and ventricles alternately contract and relax When a chamber of the heart contracts, there is an increase in blood pressure inside the chamber When a chamber of the heart relaxes, there is a decrease in blood pressure insi ...
Coronary Vessels
... Courses in posterior interventricular sulcus towards apex of heart Branches supply both ventricles and interventricular septal branches that supply the interventricular septum SLIDE 6 – know this supply R vs L heart 3. Regions supplied by right coronary artery a. Right atrium b. Sinu-atrial node ...
... Courses in posterior interventricular sulcus towards apex of heart Branches supply both ventricles and interventricular septal branches that supply the interventricular septum SLIDE 6 – know this supply R vs L heart 3. Regions supplied by right coronary artery a. Right atrium b. Sinu-atrial node ...
Reservoir and conduit function of right atrium: impact on - AJP
... heart function and can profoundly affect cardiac performance (2, 4, 14 –17, 30, 33, 34, 38), but studies examining right atrial (RA) reservoir and conduit function are limited. The mechanics of the right atrium are complex (5, 8, 24, 26). In 1628, William Harvey was the first to identify the atrium ...
... heart function and can profoundly affect cardiac performance (2, 4, 14 –17, 30, 33, 34, 38), but studies examining right atrial (RA) reservoir and conduit function are limited. The mechanics of the right atrium are complex (5, 8, 24, 26). In 1628, William Harvey was the first to identify the atrium ...
International Faculty Professor Thor Sundt III Professor David
... Minimising Surgical Invasion: Innovative Techniques Offer Advances in Therapeutic Options Coronary Artery Surgery Just Got Interesting: Understanding the Data Peroperative Transoesophageal Echocardiography: Decision Making in Cardiac Surgery Congenital Heart Surgery: Arrhythmia Surgery and Advanced ...
... Minimising Surgical Invasion: Innovative Techniques Offer Advances in Therapeutic Options Coronary Artery Surgery Just Got Interesting: Understanding the Data Peroperative Transoesophageal Echocardiography: Decision Making in Cardiac Surgery Congenital Heart Surgery: Arrhythmia Surgery and Advanced ...
Chapter_014 heart lectureRich
... Mitral and tricuspid valves open. Blood moves from atria to ventricles (third heart sound). Ventricles dilate, an energy-requiring effort that draws blood into the ventricles as the atria contract, thereby moving blood from the atria to the ventricles. Atria contract as ventricles almost filled. Cau ...
... Mitral and tricuspid valves open. Blood moves from atria to ventricles (third heart sound). Ventricles dilate, an energy-requiring effort that draws blood into the ventricles as the atria contract, thereby moving blood from the atria to the ventricles. Atria contract as ventricles almost filled. Cau ...
The Electrocardiogram (ECG)
... a differential amplifier. The three-wire connection is the simplest that will yield a usable trace (not just a heart rate). The resulting ECG will reveal all the electrical activity of the heart, only lacking the benefit of ECG signals measured between other body contact points. A full ECG diagnosis ...
... a differential amplifier. The three-wire connection is the simplest that will yield a usable trace (not just a heart rate). The resulting ECG will reveal all the electrical activity of the heart, only lacking the benefit of ECG signals measured between other body contact points. A full ECG diagnosis ...
Odessa State Medical University
... lower jaw, in both half of the chest. Pain syndrome is very similar with that in myocardial infarction and severe angina attack. The pain may last from hours to several days. Objectively determined by extending the vascular bundle, cardiac dullness, expressed hluhist heart tones, possible cyanosis, ...
... lower jaw, in both half of the chest. Pain syndrome is very similar with that in myocardial infarction and severe angina attack. The pain may last from hours to several days. Objectively determined by extending the vascular bundle, cardiac dullness, expressed hluhist heart tones, possible cyanosis, ...
Lecture Notes - Honors Human Physiology
... Cardiovascular 3 & 4: Mechanical Actions of the Heart and Determinants of Cardiac Output An essential component for the operation of the heart is the action of the valves. The valves insure that blood moves in only one direction. The opening and closing of the heart valves is controlled simply by th ...
... Cardiovascular 3 & 4: Mechanical Actions of the Heart and Determinants of Cardiac Output An essential component for the operation of the heart is the action of the valves. The valves insure that blood moves in only one direction. The opening and closing of the heart valves is controlled simply by th ...
Perfusion Techniques
... Perfusion Techniques Troubleshooting If perfusate does not flow, check to ensure that the needle tip is not occluded by the hemostats. If the lungs begin to inflate and perfusate discharges from the nose, reposition the needle. It is in the right ventricle, not the left, where it should be. You may ...
... Perfusion Techniques Troubleshooting If perfusate does not flow, check to ensure that the needle tip is not occluded by the hemostats. If the lungs begin to inflate and perfusate discharges from the nose, reposition the needle. It is in the right ventricle, not the left, where it should be. You may ...
Lab 3: Mammalian circulation (fetal pig dissection, cow heart, ECG
... do you hypothesize will happen to your subject’s cardiac cycle after resting or after exercise? As a group, develop a hypothesis about how the shape, magnitude, and frequency of the ECG will change after exercise. Record your thoughts in Worksheet 2. Explain the reasoning behind your prediction. The ...
... do you hypothesize will happen to your subject’s cardiac cycle after resting or after exercise? As a group, develop a hypothesis about how the shape, magnitude, and frequency of the ECG will change after exercise. Record your thoughts in Worksheet 2. Explain the reasoning behind your prediction. The ...
Assessment of diastolic dysfunction and heart failure with integrated
... In population based studies the prevalence of heart failure is 2-3%, but in the elderly it can reach the 20%, out of whom approximately 50% have diastolic heart failure with a similar prognosis (DHF). Similar studies have shown that the prevalence of asymptomatic diastolic dysfunction (DD) is 28% in ...
... In population based studies the prevalence of heart failure is 2-3%, but in the elderly it can reach the 20%, out of whom approximately 50% have diastolic heart failure with a similar prognosis (DHF). Similar studies have shown that the prevalence of asymptomatic diastolic dysfunction (DD) is 28% in ...
Atrial structure and fibres: morphologic bases of atrial conduction
... of pectinate muscles, the wall is very thin and almost parchment-like. Although extensively arranged, the pectinate muscles never reach the orifice of the tricuspid valve. Always, a smooth muscular rim, the vestibule, surrounds the valvar orifice, with the musculature inserting into the valvar leafl ...
... of pectinate muscles, the wall is very thin and almost parchment-like. Although extensively arranged, the pectinate muscles never reach the orifice of the tricuspid valve. Always, a smooth muscular rim, the vestibule, surrounds the valvar orifice, with the musculature inserting into the valvar leafl ...
Task Force 2: Congenital Heart Disease
... ASD— closed at operation or by interventional catheterization. The ASDs usually are completely closed by operation or device insertion. When closure is performed in childhood there is little or no residual right ventricular enlargement. Supraventricular arrhythmias can occur after closure and are mo ...
... ASD— closed at operation or by interventional catheterization. The ASDs usually are completely closed by operation or device insertion. When closure is performed in childhood there is little or no residual right ventricular enlargement. Supraventricular arrhythmias can occur after closure and are mo ...
Left Atrial Volume Index as a Clinical Marker for Atrial Fibrillation
... the chances to develop AF [1-5]. Left atrial (LA) enlargement measured by echocardiography is considered to be a useful tool in the evaluation of cardiovascular outcomes. Guidelines from the American Society of Echocardiography provide clarification as to which of the multiple methods to estimate LA ...
... the chances to develop AF [1-5]. Left atrial (LA) enlargement measured by echocardiography is considered to be a useful tool in the evaluation of cardiovascular outcomes. Guidelines from the American Society of Echocardiography provide clarification as to which of the multiple methods to estimate LA ...
Rulebased Assignment of Myocardial Sheet Orientation
... fact, that all mammalian hearts are highly optimized and efficient in their functioning. Thus they are likely to use the same mechanisms. III. Material and Methods Requisite is a volume based anatomical model of the heart with the following classification: left and right ventricle, left and right at ...
... fact, that all mammalian hearts are highly optimized and efficient in their functioning. Thus they are likely to use the same mechanisms. III. Material and Methods Requisite is a volume based anatomical model of the heart with the following classification: left and right ventricle, left and right at ...
Congenital Absence of Pericardium in Babies with Patent Ductus
... pericardium is commonly associated with congenital heart disease, including ventricular and atrial septal defect, PDA, valvular defects, and tetralogy of Fallot 3. Our patients, she was found to have PDA and ASD secundum, while the boy has PDA with small fenestrated ASD. CDH occur relatively frequen ...
... pericardium is commonly associated with congenital heart disease, including ventricular and atrial septal defect, PDA, valvular defects, and tetralogy of Fallot 3. Our patients, she was found to have PDA and ASD secundum, while the boy has PDA with small fenestrated ASD. CDH occur relatively frequen ...
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 ↑