5. CV regulation.pptx
... The vasomotor centers (VMC): This includes two components : (1) Vasoconstrictor center (VCC or pressor area) : A Very Large Group Responsible for Widespread vasoconstriction. [i.e. stimulation of VCC increases sympathetic discharge to the blood vessels ,adrenal medullae and the heart (so it was also ...
... The vasomotor centers (VMC): This includes two components : (1) Vasoconstrictor center (VCC or pressor area) : A Very Large Group Responsible for Widespread vasoconstriction. [i.e. stimulation of VCC increases sympathetic discharge to the blood vessels ,adrenal medullae and the heart (so it was also ...
Assessment of Functional Capacity in Clinical and
... measured V̇O2max in healthy untrained subjects,16 it generally occurs at a higher percentage of V̇O2max in endurance-trained individuals.17 Exercise training has been shown to increase V̇O2 at the VT to a degree that is similar to that for V̇O2max (typically 10% to 25% for previously sedentary indiv ...
... measured V̇O2max in healthy untrained subjects,16 it generally occurs at a higher percentage of V̇O2max in endurance-trained individuals.17 Exercise training has been shown to increase V̇O2 at the VT to a degree that is similar to that for V̇O2max (typically 10% to 25% for previously sedentary indiv ...
The Anatomy of the Atrioventricular Conduction System
... with vectorcardiographic patterns similar to those seen in A-V canal. The converse situation would be expected if heart size had been the determining factor; that is, the A distance would have been longer in cases Al and A2 than in cases A3 and A4. In recognition of the relationship between heart si ...
... with vectorcardiographic patterns similar to those seen in A-V canal. The converse situation would be expected if heart size had been the determining factor; that is, the A distance would have been longer in cases Al and A2 than in cases A3 and A4. In recognition of the relationship between heart si ...
Name of presentation
... Thoracic Rads - Normal Normal cats change with age • Long axis of the heart is more horizontal in old cats (40%) • Aortic bulge develops (30%) – Not due to hypertension or hyperthyroidism – At the aortic isthmus – Cardiac measurements in young & old cats are the same, despite these conformational c ...
... Thoracic Rads - Normal Normal cats change with age • Long axis of the heart is more horizontal in old cats (40%) • Aortic bulge develops (30%) – Not due to hypertension or hyperthyroidism – At the aortic isthmus – Cardiac measurements in young & old cats are the same, despite these conformational c ...
Slide Set - Professional Heart Daily
... Permanent pacemaker implantation is indicated for third-degree and advanced second-degree AV block at any anatomic level in awake, symptom-free patients in sinus rhythm, with documented periods of asystole greater than or equal to 3.0 seconds or any escape rate less than 40 bpm, or with an escape rh ...
... Permanent pacemaker implantation is indicated for third-degree and advanced second-degree AV block at any anatomic level in awake, symptom-free patients in sinus rhythm, with documented periods of asystole greater than or equal to 3.0 seconds or any escape rate less than 40 bpm, or with an escape rh ...
Evidence Based Guidelines for Exercise and Chronic Heart Failure
... Chronic heart failure (CHF) is characterized by an intolerance to exercise, with this group of patients often experiencing early fatigue and shortness of breath. Such symptoms impact upon one’s ability to perform activities of daily living, thus significantly contributing to reduced participation an ...
... Chronic heart failure (CHF) is characterized by an intolerance to exercise, with this group of patients often experiencing early fatigue and shortness of breath. Such symptoms impact upon one’s ability to perform activities of daily living, thus significantly contributing to reduced participation an ...
Left ventricular systolic/diastolic function evaluated by quantitative
... Objective: The aim of this study was to evaluate the left ventricular (LV) functional parameters calculated using quantitative electrocardiography (ECG)-gated myocardial perfusion single photon emission computed tomography (QGS). In addition to LV systolic parameters, diastolic parameters were compa ...
... Objective: The aim of this study was to evaluate the left ventricular (LV) functional parameters calculated using quantitative electrocardiography (ECG)-gated myocardial perfusion single photon emission computed tomography (QGS). In addition to LV systolic parameters, diastolic parameters were compa ...
Adenosine-Provoked Atrial Fibrillation Originating From€Non
... OBJECTIVES The goal of this study was to systematically investigate the incidence and clinical significance of non–pulmonary vein (PV) foci revealed by adenosine/adenosine triphosphate (ATP) testing during atrial fibrillation (AF) ablation. BACKGROUND ATP is reported to provoke AF. METHODS A total of ...
... OBJECTIVES The goal of this study was to systematically investigate the incidence and clinical significance of non–pulmonary vein (PV) foci revealed by adenosine/adenosine triphosphate (ATP) testing during atrial fibrillation (AF) ablation. BACKGROUND ATP is reported to provoke AF. METHODS A total of ...
Endothelium-Derived Relaxing Factor in the
... after passage through the heart under control conditions (flow rate of 20 ml/min) amounted to 0.50±0.10 pmol/mg protein. Inhibition of endothelial nitric oxide synthesis by 30 ,uM NG-nitro-L-arginine (L-NNA) reduced this amount by more than 60%. Increasing flow rate from 20 ml/min to 40 and 60 ml/mi ...
... after passage through the heart under control conditions (flow rate of 20 ml/min) amounted to 0.50±0.10 pmol/mg protein. Inhibition of endothelial nitric oxide synthesis by 30 ,uM NG-nitro-L-arginine (L-NNA) reduced this amount by more than 60%. Increasing flow rate from 20 ml/min to 40 and 60 ml/mi ...
Increasing survival rate from commotio cordis
... by cardiopulmonary resuscitation and life support (with a reported survival rate of only about 10%–15%).1,2,4 Also, one case report documented the failure to resuscitate a commotio cordis victim even with particularly prompt use of an AED.14 However, this high mortality rate was counterintuitive, gi ...
... by cardiopulmonary resuscitation and life support (with a reported survival rate of only about 10%–15%).1,2,4 Also, one case report documented the failure to resuscitate a commotio cordis victim even with particularly prompt use of an AED.14 However, this high mortality rate was counterintuitive, gi ...
Acute right ventricular failure–– from pathophysiology to new
... of the four chambers, such as those shown for the first and the third case studies (Fig. 3 and the ESM) and in recently published papers [14, 16]. Indeed, increases in the end-diastolic volume of the left ventricle are transmitted to the RV by movement of the inter-ventricular septum towards the rig ...
... of the four chambers, such as those shown for the first and the third case studies (Fig. 3 and the ESM) and in recently published papers [14, 16]. Indeed, increases in the end-diastolic volume of the left ventricle are transmitted to the RV by movement of the inter-ventricular septum towards the rig ...
M P I.
... used for initial imaging. Mapping can be done by an electroanatomic technique, by using multielectrode arrays, or by variations of these approaches. Anticoagulation is indicated for some patients undergoing ablation. In general, ablations involving the right side of the heart for supraventricular ar ...
... used for initial imaging. Mapping can be done by an electroanatomic technique, by using multielectrode arrays, or by variations of these approaches. Anticoagulation is indicated for some patients undergoing ablation. In general, ablations involving the right side of the heart for supraventricular ar ...
Acute right ventricular failure—from pathophysiology to new
... of the four chambers, such as those shown for the first and the third case studies (Fig. 3 and the ESM) and in recently published papers [14, 16]. Indeed, increases in the end-diastolic volume of the left ventricle are transmitted to the RV by movement of the inter-ventricular septum towards the rig ...
... of the four chambers, such as those shown for the first and the third case studies (Fig. 3 and the ESM) and in recently published papers [14, 16]. Indeed, increases in the end-diastolic volume of the left ventricle are transmitted to the RV by movement of the inter-ventricular septum towards the rig ...
Heartbeat detection and the experience of emotions
... by Lykken and Venables (1971). The electrocardiogram (ECG) was obtained using three stainless steel plate electrodes attached to the right arm and both legs in Standard Lead II con® guration. Physiological signals were fed through a Grass Model 7 polygraph. Skin conductance was recorded on paper; th ...
... by Lykken and Venables (1971). The electrocardiogram (ECG) was obtained using three stainless steel plate electrodes attached to the right arm and both legs in Standard Lead II con® guration. Physiological signals were fed through a Grass Model 7 polygraph. Skin conductance was recorded on paper; th ...
Left ventricular ejection time, not heart rate, is an independent
... correlations between PWV and HP, and between PWV and dP/dt were also significant (P ⬍ 0.0001) at all ages with the exception of the youngest subjects (⬍25 years; r2 ⫽ 0.003, P ⫽ 0.20). An inverse relationship between LVET and dP/dt was also found (r ⫽ ⫺0.16, P ⬍ 0.001). This relationship weakened pr ...
... correlations between PWV and HP, and between PWV and dP/dt were also significant (P ⬍ 0.0001) at all ages with the exception of the youngest subjects (⬍25 years; r2 ⫽ 0.003, P ⫽ 0.20). An inverse relationship between LVET and dP/dt was also found (r ⫽ ⫺0.16, P ⬍ 0.001). This relationship weakened pr ...
Recognizing and Managing Asymptomatic Left Ventricular Dysfunction: After Myocardial Infarction
... clinical heart failure can be reduced by using medications selected on the basis of current clinical evidence. Building on disease management models that have been successful in patients with chronic heart failure, nurse clinicians should ensure that patients who have had a myocardial infarction rec ...
... clinical heart failure can be reduced by using medications selected on the basis of current clinical evidence. Building on disease management models that have been successful in patients with chronic heart failure, nurse clinicians should ensure that patients who have had a myocardial infarction rec ...
Interrupted Inferior Vena Cava Syndrome
... the confirmation of the diagnosis. Although, the patient as yet had not manifested any complications related to this anomaly, this diagnosis is important as such it may be associated with deep vein thrombosis of the lower limbs,5 bilateral venous insufficiency or with sick sinus syndrome. The other ...
... the confirmation of the diagnosis. Although, the patient as yet had not manifested any complications related to this anomaly, this diagnosis is important as such it may be associated with deep vein thrombosis of the lower limbs,5 bilateral venous insufficiency or with sick sinus syndrome. The other ...
Reverse takotsubo cardiomyopathy with use of
... after ingesting multiple pills of Tylenol and Extenze, a product that contains yohimbine. He complained of abdominal discomfort and mild dyspnea. He was anxious and had a heart rate of 110 beats/minute. The electrocardiogram showed sinus tachycardia, right bundle branch block, and ST segment depress ...
... after ingesting multiple pills of Tylenol and Extenze, a product that contains yohimbine. He complained of abdominal discomfort and mild dyspnea. He was anxious and had a heart rate of 110 beats/minute. The electrocardiogram showed sinus tachycardia, right bundle branch block, and ST segment depress ...
A comparative study of embedded and anesthetized zebrafish in
... monitored under a light microscope for heartbeat. At this stage, fish with any sign of abnormal heartbeat or agility in swimming were discarded. The healthy fish were then transferred in egg water containing 50 μg/mL tricaine (Sigma Aldrich, Inc.) for 30 s. For embedded preparation, sedated fish was ...
... monitored under a light microscope for heartbeat. At this stage, fish with any sign of abnormal heartbeat or agility in swimming were discarded. The healthy fish were then transferred in egg water containing 50 μg/mL tricaine (Sigma Aldrich, Inc.) for 30 s. For embedded preparation, sedated fish was ...
How to Use An AED - Palm Beach State College
... more than 365,000 deaths each year. The intent of this PowerPoint presentation is to show how you can respond to SCA and to help remove any reluctance you may have to take action to help a victim of SCA. P.S. If you have not already done so, please place the presentation in the Slide Show mode by ...
... more than 365,000 deaths each year. The intent of this PowerPoint presentation is to show how you can respond to SCA and to help remove any reluctance you may have to take action to help a victim of SCA. P.S. If you have not already done so, please place the presentation in the Slide Show mode by ...
Electrophysiological..
... cycle length (TCL), corrected PPI, ∆VA (ventriculoatrial), ∆HA (His-atrial), ∆AH (atrio-His) values, and responses to His-refractory ventricular premature depolarizations were studied. Compared with atrioventricular nodal reentrant tachycardia, ORT patients were younger (42±13 years versus 54±19 yea ...
... cycle length (TCL), corrected PPI, ∆VA (ventriculoatrial), ∆HA (His-atrial), ∆AH (atrio-His) values, and responses to His-refractory ventricular premature depolarizations were studied. Compared with atrioventricular nodal reentrant tachycardia, ORT patients were younger (42±13 years versus 54±19 yea ...
Non-invasive assessment of cardiac physiology by tissue Doppler
... acoustic quantification for automatic border detection has facilitated analysis of systole and diastole, but assessment of the different phases has not been attempted'131. Tissue Doppler echocardiography is a new noninvasive method capable of quantifying the velocity of tissue motion and preliminary ...
... acoustic quantification for automatic border detection has facilitated analysis of systole and diastole, but assessment of the different phases has not been attempted'131. Tissue Doppler echocardiography is a new noninvasive method capable of quantifying the velocity of tissue motion and preliminary ...
36th Bethesda Conference - American College of Cardiology
... affecting patient care, research, and training for which absolute or hard data are incomplete. Appropriate organizations other than the American College of Cardiology Foundation (ACCF) are invited to send representatives to participate in the process, as appropriate to each topic. These may include ...
... affecting patient care, research, and training for which absolute or hard data are incomplete. Appropriate organizations other than the American College of Cardiology Foundation (ACCF) are invited to send representatives to participate in the process, as appropriate to each topic. These may include ...
What You Should Know About Your Pacemaker Patient Manual
... over a specific frequency to a mobile patient device. These messages are then transmitted via a cellular network or landline connection to the BIOTRONIK Service Center and can only be viewed by your physician via the Internet in the form of a Cardio Report. Implanted – To be placed inside the body. ...
... over a specific frequency to a mobile patient device. These messages are then transmitted via a cellular network or landline connection to the BIOTRONIK Service Center and can only be viewed by your physician via the Internet in the form of a Cardio Report. Implanted – To be placed inside the body. ...
Current and Evolving Echocardiographic Techniques
... spectral Doppler, the motion direction to be interrogated should be aligned with the ultrasound beam. If needed, separate acquisitions should be made for each wall from slightly different transducer positions. Data should be acquired over at least three beats, that is, covering at least four QRS com ...
... spectral Doppler, the motion direction to be interrogated should be aligned with the ultrasound beam. If needed, separate acquisitions should be made for each wall from slightly different transducer positions. Data should be acquired over at least three beats, that is, covering at least four QRS com ...
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.