Premature ventricular contraction with short coupling interval
... (idiopathic VF; J wave syndromes, Brugada, short and long QT, catecholaminergic polymorphic VT; variant torsion with short coupling)1,32,33. It has been observed that the same PVCSCI that triggers the MVA, do not do it in other moments, or only gives place to ventricular repetitive responses, which ...
... (idiopathic VF; J wave syndromes, Brugada, short and long QT, catecholaminergic polymorphic VT; variant torsion with short coupling)1,32,33. It has been observed that the same PVCSCI that triggers the MVA, do not do it in other moments, or only gives place to ventricular repetitive responses, which ...
MINISTRY OF HEALTH OF UKRAINE VINNYTSIA NATIONAL
... _ Imaging studies. Even before these are performed, any central neurological deficit of acute onset is very likely to be due to a cerebrovascular accident, of which ischemic stroke is the most common type; yet neuroimaging is still indicated for definitive confirmation of the diagnosis. Any patient ...
... _ Imaging studies. Even before these are performed, any central neurological deficit of acute onset is very likely to be due to a cerebrovascular accident, of which ischemic stroke is the most common type; yet neuroimaging is still indicated for definitive confirmation of the diagnosis. Any patient ...
Advances in Heart Failure - Circulation: Heart Failure
... “broken heart syndrome” or Takotsubo cardiomyopathy.3,5,12 This syndrome of acute and generally reversible heart failure with a characteristic pattern of ventricular contraction abnormalities appears due in part to increased sympathetic activity producing either direct myocardial damage or contracti ...
... “broken heart syndrome” or Takotsubo cardiomyopathy.3,5,12 This syndrome of acute and generally reversible heart failure with a characteristic pattern of ventricular contraction abnormalities appears due in part to increased sympathetic activity producing either direct myocardial damage or contracti ...
Autonomic Nervous System
... • Body temperature, water balance, and endocrine activity • Emotional stages (rage, pleasure) and biological drives (hunger, thirst, sex) • Reactions to fear and the “fight-or-flight” system ...
... • Body temperature, water balance, and endocrine activity • Emotional stages (rage, pleasure) and biological drives (hunger, thirst, sex) • Reactions to fear and the “fight-or-flight” system ...
Teaching Rounds in Cardiac Electrophysiology
... ablation a more than acceptable surrogate in the case that the clinical SMVT is not inducible.5 Although the majority of idiopathic VTs originate in hearts without structural disease, a small subset can occur in conjunction with different entities such as coronary artery disease, valvular regurgitat ...
... ablation a more than acceptable surrogate in the case that the clinical SMVT is not inducible.5 Although the majority of idiopathic VTs originate in hearts without structural disease, a small subset can occur in conjunction with different entities such as coronary artery disease, valvular regurgitat ...
Physiologic Effects of Neuraxial Blockade
... Neuraxial blockade plays a very minor role in altering pulmonary function. Even with high thoracic levels of blockade, tidal volume is unchanged. There is a slight decrease in vital capacity. This is the result of relaxation of the abdominal muscles during exhalation. The phrenic nerve is innervated ...
... Neuraxial blockade plays a very minor role in altering pulmonary function. Even with high thoracic levels of blockade, tidal volume is unchanged. There is a slight decrease in vital capacity. This is the result of relaxation of the abdominal muscles during exhalation. The phrenic nerve is innervated ...
Ultrasound - Carotid - Lubbock Radiology LP
... Doppler ultrasound is a special ultrasound technique that evaluates blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck. ...
... Doppler ultrasound is a special ultrasound technique that evaluates blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck. ...
Effects of Altitude - Argentina Medical Products
... In a recent study, Bernheim et al (2007) found that increased pulmonary artery pressure in association with exercise and altitude hypoxia did not cause left ventricular diastolic dysfunction.[6] The authors concluded, "Ventricular interaction seems not to be of hemodynamic relevance in this setting. ...
... In a recent study, Bernheim et al (2007) found that increased pulmonary artery pressure in association with exercise and altitude hypoxia did not cause left ventricular diastolic dysfunction.[6] The authors concluded, "Ventricular interaction seems not to be of hemodynamic relevance in this setting. ...
BMC Genetics - Create and Use Your home.uchicago.edu Account
... stage renal disease and peripheral vascular disease. Among these, heart disease and stroke are two of the leading cause of death in the United States [1,2]. Much effort ...
... stage renal disease and peripheral vascular disease. Among these, heart disease and stroke are two of the leading cause of death in the United States [1,2]. Much effort ...
Catheter Ablation of Ventricular Arrhythmias
... variable, ranging from an incidental finding on electrocardiogram to left ventricular dysfunction and heart failure. Dyssynchrony4 resulting from abnormal ventricular activation is felt to be an important causal mechanism of cardiomyopathy with VPD burden in most cases being greater than 20% (but ma ...
... variable, ranging from an incidental finding on electrocardiogram to left ventricular dysfunction and heart failure. Dyssynchrony4 resulting from abnormal ventricular activation is felt to be an important causal mechanism of cardiomyopathy with VPD burden in most cases being greater than 20% (but ma ...
CONTROL OF RESPIRATION
... Chemoreceptors. Most important stimulating factor is decreased PO2 on peripheral chemoreceptors. • Increased PCO2 in the arterial blood and increased H+ ion in the brain ECF strongly stimulates the central chemoreceptors and dominant control of ventilation. -Decreased PO2 in the arterial blood – dep ...
... Chemoreceptors. Most important stimulating factor is decreased PO2 on peripheral chemoreceptors. • Increased PCO2 in the arterial blood and increased H+ ion in the brain ECF strongly stimulates the central chemoreceptors and dominant control of ventilation. -Decreased PO2 in the arterial blood – dep ...
CHAPTER 41
... stem, sensory nerve signals from the lungs also help control respiration. Most important, located in the muscular portions of the walls of the bronchi and bronchioles throughout the lungs are stretch receptors that transmit signals through the vagi into the dorsal respiratory group of neurons when t ...
... stem, sensory nerve signals from the lungs also help control respiration. Most important, located in the muscular portions of the walls of the bronchi and bronchioles throughout the lungs are stretch receptors that transmit signals through the vagi into the dorsal respiratory group of neurons when t ...
Role of the Nervous System in the Control of Vascular
... stimulation. An arrangement of this type must be of some value as a local defense mechanism against harmful stimuli, since regional blood flow is automatically increased as soon as pain fibers are excited. Since such fibers are also activated when the skin is chilled more intensely, it is not surpri ...
... stimulation. An arrangement of this type must be of some value as a local defense mechanism against harmful stimuli, since regional blood flow is automatically increased as soon as pain fibers are excited. Since such fibers are also activated when the skin is chilled more intensely, it is not surpri ...
The Science Behind the emWave® and Inner Balance™ Technologies
... and as we age the range of variation in our resting heart rate becomes smaller. Although the agerelated decline in HRV is a natural process, having abnormally low HRV for one’s age group is associated with increased risk of future health problems and premature mortality. Low HRV is also observed in ...
... and as we age the range of variation in our resting heart rate becomes smaller. Although the agerelated decline in HRV is a natural process, having abnormally low HRV for one’s age group is associated with increased risk of future health problems and premature mortality. Low HRV is also observed in ...
Principles of Biology II Lab Manual
... In humans, cystic fibrosis is an inherited disease due to an autosomal recessive gene located on chromosome #7. In the most common defective allele, three base pairs are deleted and a single phenylalanine is missing. Affected individuals carry two of the recessive alleles for the disease (genotype f ...
... In humans, cystic fibrosis is an inherited disease due to an autosomal recessive gene located on chromosome #7. In the most common defective allele, three base pairs are deleted and a single phenylalanine is missing. Affected individuals carry two of the recessive alleles for the disease (genotype f ...
The State of the Art of Respiratory Control
... to CO 2 , whereas a hyperoxic background reduced the responsiveness to CO 2 . In awake human subjects, a similar relationship between alveolar CO 2 and O 2 was demonstrated in ventilation initially by Nielsen and Smith (1952). The result of this stimulus interaction is a fan of curves that later bec ...
... to CO 2 , whereas a hyperoxic background reduced the responsiveness to CO 2 . In awake human subjects, a similar relationship between alveolar CO 2 and O 2 was demonstrated in ventilation initially by Nielsen and Smith (1952). The result of this stimulus interaction is a fan of curves that later bec ...
THE CARDIOVASCULAR SYSTEM:
... Mission of the entire cardiovascular system is to keep blood flowing through capillaries to allow capillary exchange of substances between blood and tissue cells through the interstitial fluid. Substances leave the capillaries and enter the capillaries by 3 mechanisms. Diffusion - Read on own. Trans ...
... Mission of the entire cardiovascular system is to keep blood flowing through capillaries to allow capillary exchange of substances between blood and tissue cells through the interstitial fluid. Substances leave the capillaries and enter the capillaries by 3 mechanisms. Diffusion - Read on own. Trans ...
Lecture 14 - ANS
... • An important aspect of ANS function because: – If a nerve is inactive under normal conditions, it can only increase its activity – However, if nerve maintains a constant background level of activity, then it can either increase or decrease its activity ...
... • An important aspect of ANS function because: – If a nerve is inactive under normal conditions, it can only increase its activity – However, if nerve maintains a constant background level of activity, then it can either increase or decrease its activity ...
Lecture 14 - ANS
... • An important aspect of ANS function because: – If a nerve is inactive under normal conditions, it can only increase its activity – However, if nerve maintains a constant background level of activity, then it can either increase or decrease its activity ...
... • An important aspect of ANS function because: – If a nerve is inactive under normal conditions, it can only increase its activity – However, if nerve maintains a constant background level of activity, then it can either increase or decrease its activity ...
The Autonomic Nervous System
... The parasympathetic performs maintenance activities and conserves body energy ...
... The parasympathetic performs maintenance activities and conserves body energy ...
carotid ultrasound - Long Island Cardiology Associates
... Doppler ultrasound is a special ultrasound technique that evaluates blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck. ...
... Doppler ultrasound is a special ultrasound technique that evaluates blood flow through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck. ...
bupropion and the autonomic nervous system
... environmental temperature, posture, food intake, stressful experiences and other changes to which all individuals are exposed. There are two major components of the autonomic nervous system, the sympathetic and the parasympathetic systems. The afferent nerves subserving both systems convey impulses ...
... environmental temperature, posture, food intake, stressful experiences and other changes to which all individuals are exposed. There are two major components of the autonomic nervous system, the sympathetic and the parasympathetic systems. The afferent nerves subserving both systems convey impulses ...
AUTONOMIC NERVOUS SYSTEM
... ◦ Irritant receptors are rapidly adapting; respond to smoke, smog, & particulates Causes cough Hering-Breuer reflex is mediated by stretch receptors activated during inspiration when tidal volume become more than 1 liter e.g. during exercise Inhibits respiratory centers via vagus nerve to preven ...
... ◦ Irritant receptors are rapidly adapting; respond to smoke, smog, & particulates Causes cough Hering-Breuer reflex is mediated by stretch receptors activated during inspiration when tidal volume become more than 1 liter e.g. during exercise Inhibits respiratory centers via vagus nerve to preven ...
Syncope (medicine)
Syncope, also known as fainting, passing out and swooning, is defined as a short loss of consciousness and muscle strength, characterized by a fast onset, short duration, and spontaneous recovery. It is due to a decrease in blood flow to the entire brain usually from low blood pressure. Some causes have prodromal symptoms before the loss of consciousness occurs. These symptoms may include light headedness, sweating, pale skin, blurred vision, nausea, vomiting, and feeling warm, among others. Syncope may also be associated with a short episode of muscle twitching. If a person does not completely lose consciousness and muscle strength it is referred to as presyncope. It is recommended that presyncope be treated the same as syncope.Causes range from non-serious to potentially fatal. There are three broad categories of causes: heart or blood vessel related, reflex also known as neurally mediated, and orthostatic hypotension. Issues with the heart and blood vessels are the cause in about 10% and typically the most serious while neurally mediated is the most common. Heart related causes may include an abnormal heart rhythm, problems with the heart valves or heart muscle and blockages of blood vessels from a pulmonary embolism or aortic dissection among others. Neurally mediated syncope occurs when blood vessels expand and heart rate decreases inappropriately. This may occur from either a triggering event such as exposure to blood, pain or strong feelings or a specific activity such as urination, vomiting, or coughing. This type of syncope may also occur when an area in the neck known as the carotid sinus is pressed. The final type of syncope is due to a drop in blood pressure from standing up. This is often due to medications that a person is taking but may also be related to dehydration, significant bleeding or infection.A medical history, physical examination, and electrocardiogram (ECG) are the most effective ways to figure out the underlying cause. The ECG is useful to detect an abnormal heart rhythm, poor blood flow to the heart muscle, and other electrical issue such as long QT syndrome and Brugada's. Heart related causes also often have little history of a prodrome. Low blood pressure and a fast heart rate after the event may indicate blood loss or dehydration, while low blood oxygen levels may be seen following the event in those with pulmonary embolism. More specific tests such as implantable loop recorders, tilt table testing or carotid sinus massage may be useful in uncertain cases. Computer tomography (CT) is generally not required unless specific concerns are present. Other causes of similar symptoms that should be considered including seizure, stroke, concussion, low blood oxygen, low blood sugar, drug intoxication and some psychiatric disorders among others. Treatment depends on the underlying cause. Those who are considered at high risk following investigation may be admitted to hospital for further monitoring of the heart.Syncope affects about three to six out of every thousand people each year. It is more common in older people and females. It is the reason for one to three percent of visits to emergency departments and admissions to hospital. Up to half of women over the age of 80 and a third of medical students describe at least one event at some point in their life. Of all those with syncope about 4% die in the next 30 days. The risk of a bad outcome, however, depends very much on the underlying cause.