Microcontroller based PACEMAKER device with ECG feedback
... PACE: a condition in which a heart beat is initiated by a pacemaker. PAC: premature atrial contraction, a heart beat which has originated early in the upper chambers of the heart (atria). It is considered ectopic since it is not in the usual conduction pathway. PROGRAMMABLE PACEMAKER: a type of pace ...
... PACE: a condition in which a heart beat is initiated by a pacemaker. PAC: premature atrial contraction, a heart beat which has originated early in the upper chambers of the heart (atria). It is considered ectopic since it is not in the usual conduction pathway. PROGRAMMABLE PACEMAKER: a type of pace ...
electro myogram
... - The relationship between the pumping action of the heart and the electrical potentials on the skin . This relation comes from fig (1) and :- The potential distribution for the entire heart when the ventricles are one half depolarized is shown by the equipotential lines in fig (2) . - The potential ...
... - The relationship between the pumping action of the heart and the electrical potentials on the skin . This relation comes from fig (1) and :- The potential distribution for the entire heart when the ventricles are one half depolarized is shown by the equipotential lines in fig (2) . - The potential ...
Basic Pacing Concepts Part I
... Medtronic pacemakers are indicated for rate adaptive pacing in patients who may benefit from increased pacing rates concurrent with increases in activity (Thera, Thera-i, Prodigy, Preva and Medtronic.Kappa 700 Series) or increases in activity and/or minute ventilation (Medtronic.Kappa 400 Series). M ...
... Medtronic pacemakers are indicated for rate adaptive pacing in patients who may benefit from increased pacing rates concurrent with increases in activity (Thera, Thera-i, Prodigy, Preva and Medtronic.Kappa 700 Series) or increases in activity and/or minute ventilation (Medtronic.Kappa 400 Series). M ...
Heart Rate
... Frank Starling Law of the Heart If cardiac muscle sarcomeres are stretched, within limits, they contract more forcibly As sarcomeres are stretched, there are more sites available for cross bridge interaction ...
... Frank Starling Law of the Heart If cardiac muscle sarcomeres are stretched, within limits, they contract more forcibly As sarcomeres are stretched, there are more sites available for cross bridge interaction ...
Mass surrounding the heart
... Surgery Training and Research Hospital, Cardiology Clinic, Istanbul ...
... Surgery Training and Research Hospital, Cardiology Clinic, Istanbul ...
Part b
... About 1% of cardiac cells have automaticity— (are self-excitable) Gap junctions ensure the heart contracts as a unit Long absolute refractory period (250 ms) ...
... About 1% of cardiac cells have automaticity— (are self-excitable) Gap junctions ensure the heart contracts as a unit Long absolute refractory period (250 ms) ...
Drugs for Dysrhythmias Expanded Key Concepts
... potassium or calcium channels in the cell membrane. Most antidysrhythmic drugs are placed into one of five classes based on their mechanism of action. Class I agents are further subdivided into IA, IB, and IC. Agents within the same class have similar actions and adverse effects. 23.8 Sodium channel ...
... potassium or calcium channels in the cell membrane. Most antidysrhythmic drugs are placed into one of five classes based on their mechanism of action. Class I agents are further subdivided into IA, IB, and IC. Agents within the same class have similar actions and adverse effects. 23.8 Sodium channel ...
Chapter 18- The Heart
... cells located in the interatrial septum. This is the site where signal is delayed so ventricles fill. • 4. Atrioventricular bundle (bundle of his)- heart cells that carry an impulse to the interventricular septum. • 5. Bundle branches (left/right)- heart cells that carry an impulse from the interven ...
... cells located in the interatrial septum. This is the site where signal is delayed so ventricles fill. • 4. Atrioventricular bundle (bundle of his)- heart cells that carry an impulse to the interventricular septum. • 5. Bundle branches (left/right)- heart cells that carry an impulse from the interven ...
Chapters 7 and 8
... angina pectoris‐ severe chest pain caused by vasoconstriction arrhythmia, dysrhythmia‐ irregular heart beat cardiomegaly‐ enlargement of the heart congenital heart defects: heart abnormality present at birth ...
... angina pectoris‐ severe chest pain caused by vasoconstriction arrhythmia, dysrhythmia‐ irregular heart beat cardiomegaly‐ enlargement of the heart congenital heart defects: heart abnormality present at birth ...
Prof.Dr. Sherif Eldegwi Solutions R&M www.rmsolutions.net
... 24% arrhythmiaswwere found, but most were benign Most cases, were attributed to sinus tachycardia ...
... 24% arrhythmiaswwere found, but most were benign Most cases, were attributed to sinus tachycardia ...
CONGESTIVE HEART FAILURE - Home Page
... Systolic congestive heart failure occurs when the ability of the heart to contract is limited. The heart is unable to pump out an adequate blood supply during contraction, (systole). Blood coming from the lungs into the heart may back up and cause fluid leakage back into the lungs with ensuing pulmo ...
... Systolic congestive heart failure occurs when the ability of the heart to contract is limited. The heart is unable to pump out an adequate blood supply during contraction, (systole). Blood coming from the lungs into the heart may back up and cause fluid leakage back into the lungs with ensuing pulmo ...
beta-blockers: Are they useful in arrhythmias?
... good in the prevention of these tachycardias on a long-term basis. However, beta-blockers have been ineffective and contraindicated in the treatment of multifocal atrial tachycardia is frequently associated with severe obstructive lung disease.7 Although beta-blockers have been effective in some pat ...
... good in the prevention of these tachycardias on a long-term basis. However, beta-blockers have been ineffective and contraindicated in the treatment of multifocal atrial tachycardia is frequently associated with severe obstructive lung disease.7 Although beta-blockers have been effective in some pat ...
Normal Sinus Rhythm
... usually gives atrial waves in the range of 280-320bpm. • The AV node usually blocks 1/2 of these impulses and gives a ventricular response rate of 150bpm. • Atrial flutter is usually regular in rhythm and displays a ‘sawtoothed’ appearance (especially V1) as above. ...
... usually gives atrial waves in the range of 280-320bpm. • The AV node usually blocks 1/2 of these impulses and gives a ventricular response rate of 150bpm. • Atrial flutter is usually regular in rhythm and displays a ‘sawtoothed’ appearance (especially V1) as above. ...
USMLE Step 1 Web Prep — Electrical Activity of the Heart 152500
... Na- outside higher than inside. During AP never reach +70 mV on the ventricular fiber. If during ventricular AP Na channels be open, Na influx. At rest all Na channel – ...
... Na- outside higher than inside. During AP never reach +70 mV on the ventricular fiber. If during ventricular AP Na channels be open, Na influx. At rest all Na channel – ...
The Cardiorespiratory System
... of beats in 60 seconds. When measuring the pulse during exercise, count the number of beats in 6 seconds and add a zero to that number. Example: Beats in 6 seconds = 17. Add a zero = 170. Pulse rate = 170 bpm ...
... of beats in 60 seconds. When measuring the pulse during exercise, count the number of beats in 6 seconds and add a zero to that number. Example: Beats in 6 seconds = 17. Add a zero = 170. Pulse rate = 170 bpm ...
The Cardiovascular System
... • May be caused by irregularities in vessel walls or malformed cardiac valves, and may result in regurgitation of blood or restricted blood flow—and cause the heart to work harder. • The heart compensates for increase in retained blood by increasing its contraction force and consuming more oxygen. • ...
... • May be caused by irregularities in vessel walls or malformed cardiac valves, and may result in regurgitation of blood or restricted blood flow—and cause the heart to work harder. • The heart compensates for increase in retained blood by increasing its contraction force and consuming more oxygen. • ...
Ischaemic Heart Disease
... 15-20 minutes after onset of ischaemia may prevent necrosis altogether. If done later, it may not prevent necrosis, but will salvage the ischaemic myocytes will necrose if nothing is done about them. Gross appearance is haemorrhagic because vasculature injured during ischaemic period starts leaking ...
... 15-20 minutes after onset of ischaemia may prevent necrosis altogether. If done later, it may not prevent necrosis, but will salvage the ischaemic myocytes will necrose if nothing is done about them. Gross appearance is haemorrhagic because vasculature injured during ischaemic period starts leaking ...
Congestive Heart Failure
... Cardiac output is determined by preload (the volume and pressure of blood in the ventricles at the end of diastole) afterload (the volume and pressure of blood in the ventricles during systole) and myocardial ...
... Cardiac output is determined by preload (the volume and pressure of blood in the ventricles at the end of diastole) afterload (the volume and pressure of blood in the ventricles during systole) and myocardial ...
Russian to English translation
... are applied drugs 1A, 1C class, beta-blockers. In those cases, when other antiarrhythmics are ineffective kordaron used, but due to the fact that kordaron often causes side effects, it should be used only in cases of severe or threatening the development of sudden death, arrhythmias. Appointment of ...
... are applied drugs 1A, 1C class, beta-blockers. In those cases, when other antiarrhythmics are ineffective kordaron used, but due to the fact that kordaron often causes side effects, it should be used only in cases of severe or threatening the development of sudden death, arrhythmias. Appointment of ...
An Introduction to Cardiovascular Physiology - e-safe
... activity spreads out across the atria to produce atrial contraction. Electrical activity then passes through the atrioventricular node (AV node) and through into the ventricles via the Purkinje fibres in the Bundle of His to produce a ventricular contraction. If there is any disease of the conductin ...
... activity spreads out across the atria to produce atrial contraction. Electrical activity then passes through the atrioventricular node (AV node) and through into the ventricles via the Purkinje fibres in the Bundle of His to produce a ventricular contraction. If there is any disease of the conductin ...
Functions of the Heart
... in the resting heart - vagal tone is more intense than sympathetic activity... SA node wants to fire at 90 beats per minute...however the parasympathetic inhibiting effect of the vagus nerve slows SA node firing to a rate of 72 beats per minute..if the vagus nerve was interrupted...the heart rate wo ...
... in the resting heart - vagal tone is more intense than sympathetic activity... SA node wants to fire at 90 beats per minute...however the parasympathetic inhibiting effect of the vagus nerve slows SA node firing to a rate of 72 beats per minute..if the vagus nerve was interrupted...the heart rate wo ...
heart attack
... Like all living tissue, the cells of the heart need a continuous supply of oxygen. The coronary arteries supply the heart muscle with oxygen-rich blood. If the heart is deprived of this blood, it dies. If enough of the muscle dies, the heart cannot circulate blood effectively, causing a heart attack ...
... Like all living tissue, the cells of the heart need a continuous supply of oxygen. The coronary arteries supply the heart muscle with oxygen-rich blood. If the heart is deprived of this blood, it dies. If enough of the muscle dies, the heart cannot circulate blood effectively, causing a heart attack ...
Images and Case Reports in Arrhythmia and Electrophysiology
... potentials (Figure 4, left) and concealed entrainment indicated an endocardial circuit isthmus located between the aneurysm proximal border and the mitral valve. When the endocardial circuit was localized, radiofrequency energy was delivered interrupting the VT. Late potentials could be seen on that ...
... potentials (Figure 4, left) and concealed entrainment indicated an endocardial circuit isthmus located between the aneurysm proximal border and the mitral valve. When the endocardial circuit was localized, radiofrequency energy was delivered interrupting the VT. Late potentials could be seen on that ...
Dilated Cardiomyopathy
... It can affect both children and adults. Most common in middle-aged men. About 2 in 10,000 people are affected by the disease every year. ...
... It can affect both children and adults. Most common in middle-aged men. About 2 in 10,000 people are affected by the disease every year. ...