Electrical Properties of the Heart
... Calcium hypercalcaemia enhances myocardial contractility. There is shortening of the QT interval due to a shorter ST segment. In experiments large doses of calcium prevents the heart from relaxing and the heart stops in systole (calcium rigor) however calcium levels are rarely significant in the cli ...
... Calcium hypercalcaemia enhances myocardial contractility. There is shortening of the QT interval due to a shorter ST segment. In experiments large doses of calcium prevents the heart from relaxing and the heart stops in systole (calcium rigor) however calcium levels are rarely significant in the cli ...
Document
... heart, preferably performed by a veterinary cardiologist. An echocardiogram provides important information on the severity of the defect, the degree of heart chamber enlargement, the presence of concurrent defects, and helps to guide treatment. ...
... heart, preferably performed by a veterinary cardiologist. An echocardiogram provides important information on the severity of the defect, the degree of heart chamber enlargement, the presence of concurrent defects, and helps to guide treatment. ...
Diffuse Intraventricular Conduction Delay (DIVCD)
... the Metropolitan Life Insurance Compan},, the frediffuse form of IVCD. Blocks in the fascicles and main quency of DIVCD was low, 18 cases (or 0.09%) and no bundle branches are now fairly well understood. When 5 year deaths were found. Obviously if there are assothe HIS and main bundle system is full ...
... the Metropolitan Life Insurance Compan},, the frediffuse form of IVCD. Blocks in the fascicles and main quency of DIVCD was low, 18 cases (or 0.09%) and no bundle branches are now fairly well understood. When 5 year deaths were found. Obviously if there are assothe HIS and main bundle system is full ...
Puzzle and clues
... TORSADE DE POINTES—Ventricular tachycardia in which variations in the height of R waves cause an undulating or scalloped contour; literally, ìtwisting of pointsî PACEMAKER ARTIFACT—A narrow spike in the ECG tracing indicating an electrical impulse from an artificial pacemaker ESCAPE BEAT—A heartbeat ...
... TORSADE DE POINTES—Ventricular tachycardia in which variations in the height of R waves cause an undulating or scalloped contour; literally, ìtwisting of pointsî PACEMAKER ARTIFACT—A narrow spike in the ECG tracing indicating an electrical impulse from an artificial pacemaker ESCAPE BEAT—A heartbeat ...
Slide 1 - AccessCardiology
... A 50-year-old patient with type IV Wolff-Parkinson-White (WPW) syndrome is shown, who presents with a crisis of atrial fibrillation (A) and atrial flutter (B) that mimics ventricular tachycardia. The diagnosis of atrial fibrillation is supported by the history (knowing that the patient has WPW syndr ...
... A 50-year-old patient with type IV Wolff-Parkinson-White (WPW) syndrome is shown, who presents with a crisis of atrial fibrillation (A) and atrial flutter (B) that mimics ventricular tachycardia. The diagnosis of atrial fibrillation is supported by the history (knowing that the patient has WPW syndr ...
pseudo ecg myocardial infarction in young man with severe chornic
... with normal LVEF and those with CAD with normal LVEF but no difference was found in patients with decreased LVEF1. Studies support the microvascular hypothesis to further explain the pathological features and clinical course of CCC. It is our belief that knowledge of this particular and remarkable c ...
... with normal LVEF and those with CAD with normal LVEF but no difference was found in patients with decreased LVEF1. Studies support the microvascular hypothesis to further explain the pathological features and clinical course of CCC. It is our belief that knowledge of this particular and remarkable c ...
Primary cardiac sarcoma: reports of two cases and a review of
... overall mean survival or 12 months [11]. The concern about this mode of treatment is the possibility that immunosuppression may stimulate further tumour growth or recurrence and new neoplasia. In the current era of increasingly severe scarcity of donor organs this is unlikely to be a popular choice. ...
... overall mean survival or 12 months [11]. The concern about this mode of treatment is the possibility that immunosuppression may stimulate further tumour growth or recurrence and new neoplasia. In the current era of increasingly severe scarcity of donor organs this is unlikely to be a popular choice. ...
Electrical Activity in the Heart Model 1: The Excitation
... People who are not health professionals usually cannot feel a pulse. Only an ECG can confirm such an arrhythmia. As a group, explain why this is a medical emergency that requires prompt treatment. ...
... People who are not health professionals usually cannot feel a pulse. Only an ECG can confirm such an arrhythmia. As a group, explain why this is a medical emergency that requires prompt treatment. ...
ap150 heart study guide
... 34. Describe the structure and specializations of cardiac muscle cells 35. What aspects of cardiac muscle cell structure helps the cells spread electrical impulses to other cells? 36. What aspect of cardiac muscle cell structure helps connect the cells strongly to one another so they can transmit te ...
... 34. Describe the structure and specializations of cardiac muscle cells 35. What aspects of cardiac muscle cell structure helps the cells spread electrical impulses to other cells? 36. What aspect of cardiac muscle cell structure helps connect the cells strongly to one another so they can transmit te ...
Aborted Sudden Cardiac Death Associated with Short QT Syndrome
... symptom of SQTS, especially in relatively younger patients with lone AF,16,17) and our patient also had multiple episodes of AF. He was followed up for a year, no shocks have been delivered up to the present without the use of any antiarrhythmic agents. SQTS is a rare, mechanistically heterogeneous ...
... symptom of SQTS, especially in relatively younger patients with lone AF,16,17) and our patient also had multiple episodes of AF. He was followed up for a year, no shocks have been delivered up to the present without the use of any antiarrhythmic agents. SQTS is a rare, mechanistically heterogeneous ...
Comparison of Failure Rates for External and Implantable
... deflections that are at least 0. 150 mV (1.5 mm trough-topeak) in amplitude with a maximum slope of 3.2 mV/sec (termed VF counts) occurring in a 2.4 sec period (rate at least 150/min). (2) The AED will discharge if it detects a third positive interval within 7.2 sec of the start of capacitor chargin ...
... deflections that are at least 0. 150 mV (1.5 mm trough-topeak) in amplitude with a maximum slope of 3.2 mV/sec (termed VF counts) occurring in a 2.4 sec period (rate at least 150/min). (2) The AED will discharge if it detects a third positive interval within 7.2 sec of the start of capacitor chargin ...
- The waves: o P: arterial depolarization o QRS: ventricular
... through conduction. It will be depolarized through the muscles. Depolarization through muscles is much slower than Purkinje fibers depolarization - Because the left ventricle takes longer time to depolarize, a current from the right ventricle passes towards the left ventricle. As we know, the curren ...
... through conduction. It will be depolarized through the muscles. Depolarization through muscles is much slower than Purkinje fibers depolarization - Because the left ventricle takes longer time to depolarize, a current from the right ventricle passes towards the left ventricle. As we know, the curren ...
File S1 - Digital Commons@Becker
... obtaining left ventricular tissue from patients, for miRNA profiling, prior to development of the HCM phenotype is fraught with ethical issues; 2) results obtained from myectomy samples in symptomatic patients with advanced disease may not be reflective of the pre-hypertrophic stage. In fact, miRNA ...
... obtaining left ventricular tissue from patients, for miRNA profiling, prior to development of the HCM phenotype is fraught with ethical issues; 2) results obtained from myectomy samples in symptomatic patients with advanced disease may not be reflective of the pre-hypertrophic stage. In fact, miRNA ...
Congestive Heart Failure
... ii. Ventricular dilation and myocardial hypertrophy: with hemodynamic overload, the increased blood volume and pressure causes increased wall tension. To compensate for this increased wall tension, myocyte enlarge in an attempt to relieve tension on any one myocyte. Hypertrophy is damaging on severa ...
... ii. Ventricular dilation and myocardial hypertrophy: with hemodynamic overload, the increased blood volume and pressure causes increased wall tension. To compensate for this increased wall tension, myocyte enlarge in an attempt to relieve tension on any one myocyte. Hypertrophy is damaging on severa ...
Advanced Cardiac Care in the Streets Understanding EKGs
... Understanding EKGs Ray Taylor Valencia Community College ...
... Understanding EKGs Ray Taylor Valencia Community College ...
ivabradine effect versus metoprolol on the main tissue doppler
... hypertension, ischemic heart disease (clinically diagnosed: symptoms, electrocardiographic changes), diabetic nephropathy, chronic renal insufficiency up to stage II, lower limb peripheral arterial disease, diabetic neuropathy, chronic obstructive pulmonary disease with a resting heart rate between ...
... hypertension, ischemic heart disease (clinically diagnosed: symptoms, electrocardiographic changes), diabetic nephropathy, chronic renal insufficiency up to stage II, lower limb peripheral arterial disease, diabetic neuropathy, chronic obstructive pulmonary disease with a resting heart rate between ...
JACC-HF Online Appendix 1- Study Oversight
... 14. Known AIDS or HIV seropositive status, or a previous diagnosis of immunodeficiency with an absolute neutrophil count <1000 cells/mm3. 15. Diagnosis of, or treatment for, any cancer other than basal cell carcinoma within the last 5 years. (Past medical history of cancer is not exclusionary as lon ...
... 14. Known AIDS or HIV seropositive status, or a previous diagnosis of immunodeficiency with an absolute neutrophil count <1000 cells/mm3. 15. Diagnosis of, or treatment for, any cancer other than basal cell carcinoma within the last 5 years. (Past medical history of cancer is not exclusionary as lon ...
Your Answer - University of Florida
... 2. In order to differentiate between left and right ventricle on the apical four chamber view, one can use: ...
... 2. In order to differentiate between left and right ventricle on the apical four chamber view, one can use: ...
SYSTEMATIC APPROACH FOR ANALYZING CARDIAC RHYTHMS
... and it eases the strain on my brain. 6. Adenosine by Cheryl Bock Sing to “O Christmas Tree” Adenosine for SVT, a naturally occurring amino acid Adenosine for SVT, a naturally occurring amino acid A rapid bolus is the key, 1st 6 milligrams, then 12 you see A sinus pause, then RSR, we’ll get an ECG, t ...
... and it eases the strain on my brain. 6. Adenosine by Cheryl Bock Sing to “O Christmas Tree” Adenosine for SVT, a naturally occurring amino acid Adenosine for SVT, a naturally occurring amino acid A rapid bolus is the key, 1st 6 milligrams, then 12 you see A sinus pause, then RSR, we’ll get an ECG, t ...
(cardiac) output
... how much, activity it takes to make the client symptomatic (chest pain, SOB). Class I: Client exhibits no symptoms with activity. Class II: Client has symptoms with ordinary exertion. Class III: Client displays symptoms with minimal exertion. Class IV: Client has symptoms at rest. Cardiomy ...
... how much, activity it takes to make the client symptomatic (chest pain, SOB). Class I: Client exhibits no symptoms with activity. Class II: Client has symptoms with ordinary exertion. Class III: Client displays symptoms with minimal exertion. Class IV: Client has symptoms at rest. Cardiomy ...
Right ventricular function in critically ill patients
... acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) and after cardiac surgery. Patients with chronic lung diseases frequently present with chronic cor pulmonale, which is characterized by RV free wall hypertrophy and various degrees of dilation with preserved contractility. Patien ...
... acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) and after cardiac surgery. Patients with chronic lung diseases frequently present with chronic cor pulmonale, which is characterized by RV free wall hypertrophy and various degrees of dilation with preserved contractility. Patien ...
HFNEF, HFpEF, HF-PEF, or DHF
... is inadequate. Thus when the European Society of Cardiology Working Group produced new guidelines (4), the acronym HFNEF (i.e., heart failure with a normal ejection fraction) was used, as this appears to precisely describe the clinical situationda patient presents with clinical symptoms From the Div ...
... is inadequate. Thus when the European Society of Cardiology Working Group produced new guidelines (4), the acronym HFNEF (i.e., heart failure with a normal ejection fraction) was used, as this appears to precisely describe the clinical situationda patient presents with clinical symptoms From the Div ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.