The Heart Beat The heart beat is caused by impulses arising from
... signals produced when viewing the heart beat via an ECG (Electrocardiogram). This traces the electrical activity of the heart. The wave shape produced is called the QRS wave, with each part of the wave being labelled to help describe what is happening at each stage. ...
... signals produced when viewing the heart beat via an ECG (Electrocardiogram). This traces the electrical activity of the heart. The wave shape produced is called the QRS wave, with each part of the wave being labelled to help describe what is happening at each stage. ...
Asymptomatic Left Ventricular Dysfunction
... heart murmur is present). In these situations, screening would not be needed either. Screening can thus be justified among patients with an expected high prevalence of moderate-to-severe systolic ALVD and at risk for progression as characterized in the review (e.g., older individuals with hypertensio ...
... heart murmur is present). In these situations, screening would not be needed either. Screening can thus be justified among patients with an expected high prevalence of moderate-to-severe systolic ALVD and at risk for progression as characterized in the review (e.g., older individuals with hypertensio ...
Cardiovascular 10 – Mechanical Properties of the heart II
... Usually around 54% Can be up to 80% in exercise or 40% during heart failure. Cardiac Output: amount of blood pumped out each ventricle per minute; calculated by heart rate x stroke volume. Usually around 5litres. 7. Construct Simple volume-pressure diagrams from the events during the cardiac c ...
... Usually around 54% Can be up to 80% in exercise or 40% during heart failure. Cardiac Output: amount of blood pumped out each ventricle per minute; calculated by heart rate x stroke volume. Usually around 5litres. 7. Construct Simple volume-pressure diagrams from the events during the cardiac c ...
22) Where are natural pacemaker cells are located
... 33) Can the tricuspid, mitral, aortic, and pulmonary valves be open simultaneously at any instant? a. yes b. no 34) During ventricular ejection, ____. a. ventricular volume increases b. ventricular pressure does not change c. ventricular volume decreases d. AV valves are open 35) The volumes of bloo ...
... 33) Can the tricuspid, mitral, aortic, and pulmonary valves be open simultaneously at any instant? a. yes b. no 34) During ventricular ejection, ____. a. ventricular volume increases b. ventricular pressure does not change c. ventricular volume decreases d. AV valves are open 35) The volumes of bloo ...
Mammalian Heart
... -Small muscle fiber cells with only one nucleus -Individual fibers are connected to neighbors electronically via gap junctions -Two types of fibers: 1. Contractile (similar to skeletal muscle) 2. Conducting (including pacemaker cells) Do not contract, but transmit electrical signal -Cardiac contract ...
... -Small muscle fiber cells with only one nucleus -Individual fibers are connected to neighbors electronically via gap junctions -Two types of fibers: 1. Contractile (similar to skeletal muscle) 2. Conducting (including pacemaker cells) Do not contract, but transmit electrical signal -Cardiac contract ...
Cardiac output
... e.g., increased arterial systolic pressure. increased afterload will reduce cardiac output. reduced afterload (reduced total peripheral resistance) causes high cardiac output. ...
... e.g., increased arterial systolic pressure. increased afterload will reduce cardiac output. reduced afterload (reduced total peripheral resistance) causes high cardiac output. ...
Auscultation of the heart
... at the beginning of diastole the rush of blood into the left ventricle causes vibration of the valve leaflets and the chordae tendinae. • It is heard best at the apex in the left lateral position. It is louder on inspiration. Dull, low – pitched. ...
... at the beginning of diastole the rush of blood into the left ventricle causes vibration of the valve leaflets and the chordae tendinae. • It is heard best at the apex in the left lateral position. It is louder on inspiration. Dull, low – pitched. ...
Asymptomatic patients with Severe Aortic Stenosis
... Exclusion criteria • Class I or IIa indication for surgery according ...
... Exclusion criteria • Class I or IIa indication for surgery according ...
Diagnosing Heart Failure (HF)
... IV breathless at rest, any physical activity increases symptoms Heart Failure with Preserved Ejection fraction (HFPEF) of so called Diastolic HF (EF>50%) This is due to abnormal relaxation of the left ventricle in diastole. Hence normal LV systolic function and ejection fraction could still be HF.! ...
... IV breathless at rest, any physical activity increases symptoms Heart Failure with Preserved Ejection fraction (HFPEF) of so called Diastolic HF (EF>50%) This is due to abnormal relaxation of the left ventricle in diastole. Hence normal LV systolic function and ejection fraction could still be HF.! ...
Significance of myocardial mass and volume geometry evaluated by
... • Advanced shape of hypertrophic obstructive cardiomyopathy (HOCM) often lacks adequate left ventricular (LV) volume according to evolving gross LV hypertrophy. These patients often deteriorate with heart failure or developing fatal ventricular tachycardia and sudden cardiac death. ...
... • Advanced shape of hypertrophic obstructive cardiomyopathy (HOCM) often lacks adequate left ventricular (LV) volume according to evolving gross LV hypertrophy. These patients often deteriorate with heart failure or developing fatal ventricular tachycardia and sudden cardiac death. ...
FACT SHEET: SUDDEN CARDIAC ARREST
... SCA can strike persons of any age, gender, race, and even those who seem in good health, as evidenced by world class professional athletes at the peak of fitness. Many patients who may be at risk are not being identified, screened and given options for medical treatment. If someone has any of the fo ...
... SCA can strike persons of any age, gender, race, and even those who seem in good health, as evidenced by world class professional athletes at the peak of fitness. Many patients who may be at risk are not being identified, screened and given options for medical treatment. If someone has any of the fo ...
Regulation of Heart Rate
... Volume changes: End-diastolic volume, End-systolic volume, Stroke volume and Cardiac output. Aortic pressure: Diastolic pressure 80 mmHg, Systolic pressure 120 mmHg, most of systole ventricular pressure higher than ...
... Volume changes: End-diastolic volume, End-systolic volume, Stroke volume and Cardiac output. Aortic pressure: Diastolic pressure 80 mmHg, Systolic pressure 120 mmHg, most of systole ventricular pressure higher than ...
Echocardiography
... Tran thoracic Echo- transducer directly on the chest wall Transesophageal Echo- probe placed into the esophagus and stomach Stress echocardiography- Tran thoracic echo at rest and post stress or exercise ...
... Tran thoracic Echo- transducer directly on the chest wall Transesophageal Echo- probe placed into the esophagus and stomach Stress echocardiography- Tran thoracic echo at rest and post stress or exercise ...
Congestive Heart Failure
... ventricular walls, resulting from the first rapid filling so it is heard just after S2. The third heart sound is low in frequency and intensity. An S3 is commonly heard in children and young adults. In older adults and the elderly with heart disease, an S3 often means heart failure. S4 The fourth he ...
... ventricular walls, resulting from the first rapid filling so it is heard just after S2. The third heart sound is low in frequency and intensity. An S3 is commonly heard in children and young adults. In older adults and the elderly with heart disease, an S3 often means heart failure. S4 The fourth he ...
Surgical Management of Traumatic Aorta
... ventricular fistula combined with aortic insufficiency were operated on sooner or later, as reported in the review by Samuels and colleagues [4]. It has been confirmed that a traumatic aorto-right ventricular shunt with aortic insufficiency has a tendency to increase in size with time. Therefore it ...
... ventricular fistula combined with aortic insufficiency were operated on sooner or later, as reported in the review by Samuels and colleagues [4]. It has been confirmed that a traumatic aorto-right ventricular shunt with aortic insufficiency has a tendency to increase in size with time. Therefore it ...
S0735109716007087_mmc1
... coronary artery disease; patients were excluded if they had an indication for the treatment of epicardial stenosis. A 7-F Conductance catheter (CD Leycom, Zoetermeer, Netherlands) was then advanced via the right femoral artery into the left ventricle under fluoroscopy and connected to a pressure vol ...
... coronary artery disease; patients were excluded if they had an indication for the treatment of epicardial stenosis. A 7-F Conductance catheter (CD Leycom, Zoetermeer, Netherlands) was then advanced via the right femoral artery into the left ventricle under fluoroscopy and connected to a pressure vol ...
Sudden Death in Congenital Heart Disease:
... Netherlands data • 8595 ACHD patients, mean f/u 37 months – 2.7% mortality, mean age 48 years • 22% of deaths were sudden (<1% of population experienced SCD over this limited time frame) – 10% of these occurred during exercise – Ebsteins, DORV, TGA, VSD, aortic stenosis had more SCD than other l ...
... Netherlands data • 8595 ACHD patients, mean f/u 37 months – 2.7% mortality, mean age 48 years • 22% of deaths were sudden (<1% of population experienced SCD over this limited time frame) – 10% of these occurred during exercise – Ebsteins, DORV, TGA, VSD, aortic stenosis had more SCD than other l ...
CHAPTER e31 Cardiac Manifestations of Systemic Disease
... left and, in some cases, right ventricular hypertrophy and generalized cardiac dilation. Pulmonary congestion, peripheral edema, and exercise intolerance may all ensue; however, the recognition of these findings may be difficult in massively obese patients. Weight reduction is the most effective the ...
... left and, in some cases, right ventricular hypertrophy and generalized cardiac dilation. Pulmonary congestion, peripheral edema, and exercise intolerance may all ensue; however, the recognition of these findings may be difficult in massively obese patients. Weight reduction is the most effective the ...
Form
... (check all that apply) 50-69% stenosis with sig FFR/IVUS Chronic total occlusion is only stenosis Prior CABG - 3VD & multiple graft failure LIMA used - no longer functional LIMA used - patent to native coronary ...
... (check all that apply) 50-69% stenosis with sig FFR/IVUS Chronic total occlusion is only stenosis Prior CABG - 3VD & multiple graft failure LIMA used - no longer functional LIMA used - patent to native coronary ...
Slide 1 - Annals of Internal Medicine
... Measurement of the contribution of external forces to resting left ventricular diastolic pressures.ddA. Stable resting left ventricular pressure-volume loop. End-diastolic pressure is shown at the lower right corner (●). The diastolic pressure-volume boundary forms the lower side of the loop. B. Aft ...
... Measurement of the contribution of external forces to resting left ventricular diastolic pressures.ddA. Stable resting left ventricular pressure-volume loop. End-diastolic pressure is shown at the lower right corner (●). The diastolic pressure-volume boundary forms the lower side of the loop. B. Aft ...
MMNN
... compliant than the left, a large volume of blood shunts through the defect from the left to the right atrium and then to the right ventricle and pulmonary arteries As a result there is gradual enlargement of the right side of the heart and of the pulmonary arteries. Pulmonary hypertension and shunt ...
... compliant than the left, a large volume of blood shunts through the defect from the left to the right atrium and then to the right ventricle and pulmonary arteries As a result there is gradual enlargement of the right side of the heart and of the pulmonary arteries. Pulmonary hypertension and shunt ...
Cardiology (McMullan)
... no longer recommended!, valve repair only for severe regurgitation +/- atrial fibrillation or pulmonary HTN ...
... no longer recommended!, valve repair only for severe regurgitation +/- atrial fibrillation or pulmonary HTN ...
Shone Syndrome - Adult Congenital Heart Association
... The presentation is variable. If found at birth, it is generally more severe. If the infant is not getting adequate blood to the lower extremities, immediate surgical repair is needed. This is the treatment of choice in the infant and young child. Adults diagnosed later in life often present with a ...
... The presentation is variable. If found at birth, it is generally more severe. If the infant is not getting adequate blood to the lower extremities, immediate surgical repair is needed. This is the treatment of choice in the infant and young child. Adults diagnosed later in life often present with a ...
Chronic Heart Failure - โรงพยาบาลเชียงรายประชานุเคราะห์
... with stable, mild, moderate, and severe heart failure from ischaemic or non-ischaemic cardiomyopathies and reduced LVEF on standard treatment ...
... with stable, mild, moderate, and severe heart failure from ischaemic or non-ischaemic cardiomyopathies and reduced LVEF on standard treatment ...
Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is a primary disease of the myocardium (the muscle of the heart) in which a portion of the myocardium is hypertrophied (thickened) without any obvious cause, creating functional impairment of the cardiac muscle. It is a leading cause of sudden cardiac death in young athletes.The occurrence of hypertrophic cardiomyopathy is a significant cause of sudden unexpected cardiac death in any age group and as a cause of disabling cardiac symptoms. Younger people are likely to have a more severe form of hypertrophic cardiomyopathy.HCM is frequently asymptomatic until sudden cardiac death, and for this reason some suggest routinely screening certain populations for this disease.A cardiomyopathy is a disease that affects the muscle of the heart. With HCM, the myocytes (cardiac contractile cells) in the heart increase in size, which results in the thickening of the heart muscle. In addition, the normal alignment of muscle cells is disrupted, a phenomenon known as myocardial disarray. HCM also causes disruptions of the electrical functions of the heart. HCM is most commonly due to a mutation in one of nine sarcomeric genes that results in a mutated protein in the sarcomere, the primary component of the myocyte (the muscle cell of the heart). These are predominantly single-point missense mutations in the genes for beta-myosin heavy chain (MHC), myosin-binding protein C, cardiac troponinT, or tropomyosin. These mutations cause myofibril and myocyte structural abnormalities and possible deficiencies in force generation. Not to be confused with dilated cardiomyopathy or any other cardiomyopathy.While most literature so far focuses on European, American, and Japanese populations, HCM appears in all ethnic groups. The prevalence of HCM is about 0.2% to 0.5% of the general population.