Mapping Reentry - Circulation: Arrhythmia and Electrophysiology
... In some patients, sites that are close together sites may show marked differences in the PPI. This finding usually signifies a region of anatomic, functional, or pathological block (or slow conduction) between the 2 sites mapped. For example, a lower loop reentry circuit behind the Eustachian ridge, ...
... In some patients, sites that are close together sites may show marked differences in the PPI. This finding usually signifies a region of anatomic, functional, or pathological block (or slow conduction) between the 2 sites mapped. For example, a lower loop reentry circuit behind the Eustachian ridge, ...
as a PDF
... cardiomyopathy. 99mTc-Labeled annexin A5 has successfully been used for the noninvasive detection of PCD in myocardial infarction and heart transplant rejection. The present study evaluated the role of annexin A5 imaging for detection of PCD in heart failure patients. Methods: Annexin A5 imaging was ...
... cardiomyopathy. 99mTc-Labeled annexin A5 has successfully been used for the noninvasive detection of PCD in myocardial infarction and heart transplant rejection. The present study evaluated the role of annexin A5 imaging for detection of PCD in heart failure patients. Methods: Annexin A5 imaging was ...
Heart sounds and murmurs
... 1. pulmonary area: in the second left intercostal space 2. aortic area: in the second right intercostal space 3. mitral area: (apex) in the fifth intercostal space at mid clavicular line (9cm from sternum) 4. tricuspid area: at the lower part of sternum towards the right side. **BEST HEART AT: mitra ...
... 1. pulmonary area: in the second left intercostal space 2. aortic area: in the second right intercostal space 3. mitral area: (apex) in the fifth intercostal space at mid clavicular line (9cm from sternum) 4. tricuspid area: at the lower part of sternum towards the right side. **BEST HEART AT: mitra ...
Cardiac Muscle Tissue
... blood into the vessels of the circulatory system. Similar to skeletal muscle, cardiac muscle is striated and organized into sarcomeres, possessing the same banding organization as skeletal muscle (Figure 1 (Cardiac Muscle Tissue )). However, cardiac muscle bers are shorter than skeletal muscle ber ...
... blood into the vessels of the circulatory system. Similar to skeletal muscle, cardiac muscle is striated and organized into sarcomeres, possessing the same banding organization as skeletal muscle (Figure 1 (Cardiac Muscle Tissue )). However, cardiac muscle bers are shorter than skeletal muscle ber ...
heart and circulation sdg
... • Continuous murmur best heard in R infraclavicular • Decreases lying flat or with occlusion of neck veins ...
... • Continuous murmur best heard in R infraclavicular • Decreases lying flat or with occlusion of neck veins ...
Inability of Potassium Canrenoate to Convert Experimentally
... 1.0-msec square pulses (40 Hz, 8-10 v) delivered from a Grass SD-5 stimulator. The lead II electrocardiogram was monitored continuously on an oscilloscope and recorded along with the arterial blood pressure. In 12 of the 20 dogs, a bipolar pacemaker electrode (USCI-NBIH) was placed in the right atri ...
... 1.0-msec square pulses (40 Hz, 8-10 v) delivered from a Grass SD-5 stimulator. The lead II electrocardiogram was monitored continuously on an oscilloscope and recorded along with the arterial blood pressure. In 12 of the 20 dogs, a bipolar pacemaker electrode (USCI-NBIH) was placed in the right atri ...
Read full article - Scientific Works. C Series. Veterinary Medicine
... Small rodents are the most used experimental models in research related to cardiovascular and respiratory system. The guinea pigs occupy a leading position. However, detailed anatomical descriptions of the thoracic cavity of this specie are relatively few in the literature. Compared to mice, rats or ...
... Small rodents are the most used experimental models in research related to cardiovascular and respiratory system. The guinea pigs occupy a leading position. However, detailed anatomical descriptions of the thoracic cavity of this specie are relatively few in the literature. Compared to mice, rats or ...
The effect of baroreceptor activity on cardiovascular regulation
... of baroreceptors is abolished and the heart sympathetic depolarization is more intense32. In general, the increased afferent activity of baroreceptors that is caused by AP increase inhibits the efferent vasomotor action of the sympathetic system, whilst the reduced afferent activity of baroreceptors ...
... of baroreceptors is abolished and the heart sympathetic depolarization is more intense32. In general, the increased afferent activity of baroreceptors that is caused by AP increase inhibits the efferent vasomotor action of the sympathetic system, whilst the reduced afferent activity of baroreceptors ...
Honors Project 14: Measuring Cardiac Output
... Cardiac output is, by definition, the volume of blood pumped by the heart in a specific period of time. The cardiac output of an individual at rest is, for example, on the order of 5 liters per minute. The measurement of cardiac output is important since it is an indicator of certain diseases of the b ...
... Cardiac output is, by definition, the volume of blood pumped by the heart in a specific period of time. The cardiac output of an individual at rest is, for example, on the order of 5 liters per minute. The measurement of cardiac output is important since it is an indicator of certain diseases of the b ...
Anaesthesia For Valvular Heart Diseases
... In AF: Beta blockers, Ca #, Digitalis (H.R. control) Anticoagulants (Warfarin to get INR of 2.5 to 3) ...
... In AF: Beta blockers, Ca #, Digitalis (H.R. control) Anticoagulants (Warfarin to get INR of 2.5 to 3) ...
Evaluation of Palpitations: Etiology and Diagnostic
... the syncope may be secondary to a very rapid heart rate and thus may respond to antiarrhythmic therapy.10 However, syncope in patients with VT and underlying heart disease is often refractory to antiarrhythmic therapy and may herald sudden death. Syncope caused by SVT is rare, occurring as a manifes ...
... the syncope may be secondary to a very rapid heart rate and thus may respond to antiarrhythmic therapy.10 However, syncope in patients with VT and underlying heart disease is often refractory to antiarrhythmic therapy and may herald sudden death. Syncope caused by SVT is rare, occurring as a manifes ...
Resting Heart Rate and the Risk of Heart Failure in Healthy Adults
... failure, atrial fibrillation, and those with known coronary heart disease (CHD) defined as a history of myocardial infarction, coronary artery bypass grafting, or percutaneous coronary intervention.10 The final sample for analysis comprised 4,768 participants. ...
... failure, atrial fibrillation, and those with known coronary heart disease (CHD) defined as a history of myocardial infarction, coronary artery bypass grafting, or percutaneous coronary intervention.10 The final sample for analysis comprised 4,768 participants. ...
heart failure - American Heart Association
... are continually collected and results are monitored over time to determine when new initiatives or revised processes should be incorporated. As such, achievement measures help speed the translation of strong clinical evidence into practice. In order for participating hospitals to earn recognition fo ...
... are continually collected and results are monitored over time to determine when new initiatives or revised processes should be incorporated. As such, achievement measures help speed the translation of strong clinical evidence into practice. In order for participating hospitals to earn recognition fo ...
Left Ventricular Function Described in Physical Terms
... computed from the record of ventricular pressure. A linear ramp voltage was formed while the ventricular pressure was above a predetermined level (about 15 mm. Hg), so that the peak voltage attained by the ramp indicated the duration of systole in seconds. To secure a record of heart rate, the abrup ...
... computed from the record of ventricular pressure. A linear ramp voltage was formed while the ventricular pressure was above a predetermined level (about 15 mm. Hg), so that the peak voltage attained by the ramp indicated the duration of systole in seconds. To secure a record of heart rate, the abrup ...
Atrial Fibrillation in Europe: How AWARE are you?
... irregular and often the heart rate is too fast or too slow Atrial fibrillation is the most common clinically relevant heart rhythm abnormality affecting people worldwide:1-4 ...
... irregular and often the heart rate is too fast or too slow Atrial fibrillation is the most common clinically relevant heart rhythm abnormality affecting people worldwide:1-4 ...
Congenital Heart Disease from the Block
... You point out that certain patients who have cardiovascular pathology may be at increased risk for cerebrovascular accident. Which of the following cardiac conditions is MOST likely to be associated with a cerebrovascular accident? ...
... You point out that certain patients who have cardiovascular pathology may be at increased risk for cerebrovascular accident. Which of the following cardiac conditions is MOST likely to be associated with a cerebrovascular accident? ...
Randomized Trial of Cardiac Resynchronization in Mildly
... the 12 months) because of or associated with worsening HF, crossed over or permanently discontinued double-blind treatment because of worsening HF at any time during the 12 months, demonstrated worsening in NYHA functional class at their 12-month visit, or reported moderately or markedly worse heart ...
... the 12 months) because of or associated with worsening HF, crossed over or permanently discontinued double-blind treatment because of worsening HF at any time during the 12 months, demonstrated worsening in NYHA functional class at their 12-month visit, or reported moderately or markedly worse heart ...
A Novel Method for Cine-CMR Automated Assessment of Left
... volume recovery occurs, Early (E) to late (A) diastolic profile [E/A ratio] calculated as ratio of E to A wave magnitude (diastolic rate profile). In order to compare CMR diastolic parameters to an established clinical standard, transthoracic echocardiography (echo) was performed for dedicated asses ...
... volume recovery occurs, Early (E) to late (A) diastolic profile [E/A ratio] calculated as ratio of E to A wave magnitude (diastolic rate profile). In order to compare CMR diastolic parameters to an established clinical standard, transthoracic echocardiography (echo) was performed for dedicated asses ...
A Patient`s Guide - Amarillo Heart Group
... How the Heart Works Before discussing cardiac catheterization, it helps to understand how the heart works. The Heart as a Pump The heart is a hollow organ that constantly pumps blood throughout the body. It is made of strong muscle tissue, called heart muscle (myocardium). The heart has four chambe ...
... How the Heart Works Before discussing cardiac catheterization, it helps to understand how the heart works. The Heart as a Pump The heart is a hollow organ that constantly pumps blood throughout the body. It is made of strong muscle tissue, called heart muscle (myocardium). The heart has four chambe ...
Management of Arrhythmias in Heart Failure
... temporal repolarization dynamics using clinical noninvasive metrics, such as the QT-interval variability index and T-wave alternans on the surface electrocardiogram [25]. However, despite these studies, a direct mechanistic link between repolarization changes observed in isolated myocytes or on the ...
... temporal repolarization dynamics using clinical noninvasive metrics, such as the QT-interval variability index and T-wave alternans on the surface electrocardiogram [25]. However, despite these studies, a direct mechanistic link between repolarization changes observed in isolated myocytes or on the ...
PDF Full-text
... Most studies in ectothermic vertebrates show that the dominant pacemaker activity is located at the sinuatrial junction, albeit that an anatomical sinus node is absent [20,21,35,37,55,56]. In addition, some studies report pacemaking upstream of the sinuatrial junction at variable positions [53,57], ...
... Most studies in ectothermic vertebrates show that the dominant pacemaker activity is located at the sinuatrial junction, albeit that an anatomical sinus node is absent [20,21,35,37,55,56]. In addition, some studies report pacemaking upstream of the sinuatrial junction at variable positions [53,57], ...
Cardiac apex: Spectrum of diseases in Cardiovascular Magnetic
... apex of left ventricle (LV). Apical HCM was originally described in individuals of asian descent but it is now being diagnosed increasignly in the western world. the reported rate of occurance of apical HCM range from 2 to 25%. Unlike typical HCM, apical HCM shows a predilection for middle-aged men, ...
... apex of left ventricle (LV). Apical HCM was originally described in individuals of asian descent but it is now being diagnosed increasignly in the western world. the reported rate of occurance of apical HCM range from 2 to 25%. Unlike typical HCM, apical HCM shows a predilection for middle-aged men, ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.