Myocardial contraction. Medical search. Frequent questions

Acute myocardial infarction following sequential multi-vessel occlusion in a case of polycythemia vera. (iasp-pain.org)
A resultant acute myocardial infarction is therefore complicated and difficult to manage, due to the patient's continuous hypercoagulable state. (iasp-pain.org)
Myocardial infarction (MI) due to coronary artery disease is a leading cause of death in the United States, where more than 1 million people have acute myocardial infarctions (AMIs) each year. (medscape.com)
For other discussions on myocardial infarction, see Myocardial Infarction, Right Ventricular Infarction, Acute Myocardial Infarct Imaging, and Cardiac Markers. (medscape.com)
2] About 90% of patients who have an acute myocardial infarction (AMI) develop some form of cardiac arrhythmia during or immediately after the event. (medscape.com)
The incidence of arrhythmia is higher with an ST-elevation myocardial infarction (STEMI) and lower with a non-ST-elevation myocardial infarction (NSTEMI). (medscape.com)
Low dose dobutamine echocardiography and myocardial contrast echocardiography were used to study patients before hospital discharge who had suffered a recent myocardial infarction and had a patent infarct-related artery (TIMI flow grade 3). (nih.gov)
3 Heart failure is becoming increasingly common as the U.S. population ages and survival rates after acute myocardial infarction increase. (aafp.org)
Do you understand myocardial infarction and all the emergencies related to it? (proprofs.com)
To check your understanding, try this myocardial infarction MCQs with answers. (proprofs.com)
Otherwise and commonly known as a heart attack, Myocardial Infarction, abbreviated as MI, is when the blood decreases in the heart and stops. (proprofs.com)
Tissue plasminogen activator (tPA) is considered for treatment of a patient who arrives in the emergency department following onset of symptoms of myocardial infarction. (proprofs.com)
History of prior myocardial infarction. (proprofs.com)
Following myocardial infarction, a hospitalized patient is encouraged to practice frequent leg exercises and ambulate in the hallway as directed by his physician. (proprofs.com)
A patient arrives in the emergency department with symptoms of myocardial infarction, progressing to cardiogenic shock. (proprofs.com)
Cardiogenic shock is a serious complication of myocardial infarction with a high mortality rate. (proprofs.com)
Which of the following is the most common symptom of myocardial infarction? (proprofs.com)
While this rhythm disturbance may be associated with heart attack (myocardial infarction), evidence suggests that more than half are not related to heart attack. (britannica.com)
They examine patients discharged with diagnoses of heart failure, acute myocardial infarction (AMI), and pneumonia. (theincidentaleconomist.com)
The clinical significance of the nature of blood supply to the papillary muscles is that a myocardial infarction involving the PDA is more likely to cause mitral regurgitation. (wikidoc.org)
Severe ischemia can cause the heart muscle to die of oxygen starvation, called a myocardial infarction . (wikidoc.org)
Progressive activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system contributes to chronic heart failure, including that which occurs after acute myocardial infarction. (standardofcare.com)
Activation of this system increases the risk of myocardial infarction. (standardofcare.com)
Activation of this system in the presence of hypertension is associated with an increased risk of myocardial infarction and stroke. (standardofcare.com)
A heart attack, also called a myocardial infarction, happens when a part of the heart muscle doesn't get enough blood. (cdc.gov)
Specifically, SSO 2 is indicated for "widowmaker" heart attacks, left anterior descending ST-elevation myocardial infarction (LAD STEMI), which are treated within six hours of the start of symptoms. (medgadget.com)
We were among the first in Europe to observe the beneficial impact of SSO 2 Therapy on left ventricular recovery after primary coronary intervention in patients with LAD ST-elevation myocardial infarction and we look forward to being able to use this effective treatment again in our patients. (medgadget.com)
Apical 4-chamber views show a breach in the interventricular septum and free communication between ventricles through a large apical septum ventricular septal defect in a patient who recently had an anterior myocardial infarction. (medscape.com)
For other discussions on myocardial infarction, see Myocardial Infarction, Right Ventricular Infarction, Imaging of Acute Myocardial Infarcts, and Use of Cardiac Markers in the Emergency Department. (medscape.com)

In patients with post-infarct dysfunctioning myocardium but a patent infarct-related artery, microvascular integrity, as assessed by myocardial contrast echocardiography, is an indicator of myocardial viability in terms of preserved contractile reserve, as demonstrated by dobutamine infusion and functional recovery at follow-up. (nih.gov)
Strain expresses the instantaneous deformation of the myocardium and directly describes its contraction/relaxation pattern. (escardio.org)
The main advantage of strain and strain-rate analysis compared to myocardial velocity measurements is the ability to differentiate active contraction from passive motion, resulting from the global heart translation, or from the pulling by surrounding myocardium. (escardio.org)
During contraction of the ventricular myocardium ( systole ), the subendocardial coronary vessels (the vessels that enter the myocardium) are compressed due to the high intraventricular pressures. (wikidoc.org)
More recently it has been also used for the evaluation of myocardial strain or simplified for the assessment of regional deformations of the myocardium such as thickening, shortening or lengthening. (radiopaedia.org)

At the cellular level acute myocardial ischemia leads to adenosine triphosphate (ATP) deficiency, anaerobic glycolysis causing acidosis, elevation of extracellular potassium (K+), and lysophosphatidylcholine accumulation. (medscape.com)
Of 97 such patients, about 44% underwent CAD/ischemia testing by invasive angiography, myocardial functional imaging, or both. (medscape.com)
The findings "argue against performing routine evaluations to rule out coronary [disease] or myocardial ischemia as culprits in monomorphic VT storm" in patients without evidence of ACS, write Feras Alkhalaileh, MD, Heart and Vascular Institute, Cleveland Clinic, Ohio, and colleagues in their report published August 2 in JACC: Clinical Electrophysiology . (medscape.com)
Chronic moderate ischemia causes contraction of the heart to weaken, known as myocardial hibernation. (wikidoc.org)

There is a need for an accurate and reproducible echo parameter to identify early myocardial contractility abnormalities that cannot be detected with traditional methods in order to optimise the timing of surgery in this type of patient. (escardio.org)
Strain and strain-rate have come up quite recently as quantitative variables that can accurately estimate regional myocardial contractility. (escardio.org)
Echocardiography has been traditionally used as a first-line imaging technique in the evaluation of cardiac morphology and function as well as in the assessment of myocardial contractility and the contractile reserve 11 . (radiopaedia.org)
Most inotropes used in the clinics function by increasing the levels of cytosolic calcium (Ca +2 ), whereas levosimendan (LS) stimulates myocardial contractility without raising the intracellular Ca +2 concentration [ 1 2 ]. (ispub.com)

Annular velocities were significantly higher than basal myocardial velocities in systole and early diastole. (avma.org)
As a result most myocardial perfusion occurs during heart relaxation ( diastole ) when the subendocardial coronary vessels are patent and under low pressure. (wikidoc.org)

As reported, 10% of the cohort underwent coronary angiography after presentation with monomorphic VT storm, 26% had CT or PET myocardial functional imaging, and 9% had both tests. (medscape.com)
A less common cause is a severe spasm, or sudden contraction, of a coronary artery that can stop blood flow to the heart muscle. (cdc.gov)

Left Ventricular Contraction Pattern in Chronic Aortic Regurgitation and Preserved Ejection Fraction: Simultaneous Stress-Strain Analysis by Three-Dimensional Echocardiography. (uib.no)
The chaotic nature of excitation and inefficient ventricular contraction in pathological ventricular arrhythmias frequently compromises circulation . (britannica.com)
Slower sodium entry delays membrane depolarization, therefore decelerating ventricular contraction and prolonging the QRS. (emra.org)

Heart failure can be divided into 4 functional classifications: systolic myocardial failure, impedance to cardiac inflow, pressure overload, and volume overload. (merckvetmanual.com)
Systolic myocardial failure is a general reduction in the ability of the heart muscle to contract. (merckvetmanual.com)
AF could lead to the loss of atrial systolic function and ventricular irregular contraction and then promote the decline of cardiac diastolic function. (hindawi.com)
The mean values of right ventricular fractional area change (RVFAC), tricuspid annular plane systolic excursion (TAPSE), right ventricular ejection fraction (RVEF), right myocardial performance index (RMPI), and tricuspid annular plane systolic speed (S') were compared between patients after COVID-19 rehabilitation and healthy subjects. (hindawi.com)

Tissue characterization shows a large area of subendocardial and mid-myocardial delayed enhancement that is most prominent in the LV apex, a laminated LV apical thrombus, and trivial circumferential pericardial effusion with evidence of diffuse pericardial inflammation. (medscape.com)

Primarily indicated for the short-term treatment of acutely decompensated severe chronic heart failure , levosimendan increases myocardial contraction without markedly increasing oxygen demand. (medscape.com)

However, even though these drugs may reduce premature contractions, they are not effective in reducing sudden cardiac death. (britannica.com)

Here, we utilize in vivo biophysical and genetic fate mapping zebrafish studies to reveal that altered hemodynamic forces due to cardiac injury activate a sequential endocardial-myocardial signaling cascade to direct cardiomyocyte reprogramming and heart regeneration. (elifesciences.org)

Cardiac CT can be used for the assessment of myocardial morphology and myocardial perfusion. (radiopaedia.org)

The second wave is the A wave, which represents late diastolic ventricular filling because to active left atrial contraction. (thieme-connect.de)

However, those that result in hypotension, increase myocardial oxygen requirements, and/or predispose the patient to develop additional malignant ventricular arrhythmias should be aggressively monitored and treated. (medscape.com)
The efficacy of these drugs was assessed based on their ability to control the frequency of premature ventricular contractions and other transient ventricular arrhythmias. (britannica.com)

The capacity of the heart to adapt to short-term changes in preload or afterload is remarkable, but sudden or sustained changes in preload (e.g., acute mitral regurgitation, excessive intravenous hydration), afterload (e.g., aortic stenosis, severe uncontrolled hypertension), or demand (e.g., increased demand because of severe anemia or hyperthyroidism) may lead to progressive failure of myocardial function. (aafp.org)
Long-term hypertension, especially long-term uncontrolled hypertension, could directly lead to myocardial hypertrophy, myocardial wall stiffness, and compliance decline, eventually causing a decrease in diastolic function. (hindawi.com)

Diltiazem has been shown to produce increases in exercise tolerance, probably due to its ability to reduce myocardial oxygen demand. (nih.gov)
LS increases the Ca +2 response to myofilament by binding to cardiac troponin C. As a result, myocardial contraction increases without a higher myocardial O 2 consumption [ 2 3 4 ]. (ispub.com)

Procedure -Radial myocardial velocities were recorded in an endocardial and epicardial segment, and longitudinal velocities were recorded in 2 LVFW segments (basal and apical) and in the annulus of the left atrioventricular valve. (avma.org)

Strain and strain-rate are new parameters that provide crucial information able to unmask latent myocardial dysfunction in patients with severe MR. This promising diagnostic tool can help the cardiologist choose the timing of surgery in asymptomatic patients with chronic severe MR. Once contractile dysfunction is detected, surgery should be promptly performed to avoid the development of irreversible and significant LV dysfunction. (escardio.org)

Strain-rate expresses the velocity of myocardial deformation (1). (escardio.org)

Consequently, Klf2a then activates endocardial Notch signaling which results in the non-cell autonomous initiation of myocardial Erbb2 and BMP signaling to promote cardiomyocyte reprogramming and heart regeneration. (elifesciences.org)
This endocardial Notch signaling can in turn non-cell autonomously initiate myocardial Erbb2 and BMP signaling to promote cardiomyocyte reprogramming and heart regeneration, whereas its inhibition through either using tissue-specific genetic-based strategies or altering blood flow impairs this reparative event. (elifesciences.org)
Myocardial conduction happens from cardiomyocyte to cardiomyocyte via the intercalated disks, which form the mechanical and electrical contacts between the myocardial cells 10 . (radiopaedia.org)

In contrast, monomorphic VT storm is likely caused by myocardial scar, which revascularization cannot treat. (medscape.com)
In contrast, premature ventricular contractions can occur spontaneously in healthy people without any consequence. (britannica.com)

Indices of myocardial metabolic adaptation (e.g., substrate reliance perturbations) to STZ-induced diabetes and high fat meal feeding were found to be dependent on genotype. (nih.gov)
Because there's scar substrate, we find that ischemic evaluations are technically without much yield. (medscape.com)

If the papillary muscles are not functioning properly, the mitral valve leaks during contraction of the left ventricle and causes some of the blood to travel "in reverse", from the left ventricle to the left atrium, instead of forward to the aorta and the rest of the body. (wikidoc.org)

Based on these findings, we thus further explored whether altered blood flow forces during cardiac injury may similarly activate these signaling pathways to control myocardial reprogramming and regeneration. (elifesciences.org)

The results showed that a total of 278 proteins with significant changes were identified by quantitative proteomic analysis, of which 118 proteins were significantly upregulated and 160 proteins were significantly downregulated in myocardial tissue. (frontiersin.org)
The lymphatic function is critical to maintaining the myocardial interstitial fluid equilibrium and cardiac function and it has been advocated that it aids tissue repair and prevents adverse remodeling in case of myocardial injury 9 . (radiopaedia.org)

The expression of protein kinase C (PKC) isoenzymes and the effects of PKC activation on myocardial phospholipase A2 (PLA2) activity, platelet-activating factor (PAF) generation and eicosanoid release were studied in spontaneously beating cultured rat cardiomyocytes. (unige.ch)

Our clinical experiences with LS has shown that it reduces conventional inotropic agents dosages and could be a satisfactory agent in myocardial depression therapy which occurred in CPB surgery intraoperatively also in pediatric patients. (ispub.com)

Myocardial inefficiency is an early indicator of exercise-induced myocardial fatigue. (uib.no)

Muscular contraction promotes venous return and prevents hemostasis in the lower extremities. (proprofs.com)

Can normalize blood pressure and myocardial contraction. (wikipedia.org)

Anatomy13

Organisms3

Diseases1

Chemicals and Drugs8

Analytical, Diagnostic and Therapeutic Techniques and Equipment3

Phenomena and Processes16

Infarction29

Myocardium5

Ischemia4

Contractility4

Diastole2

Coronary2

Ventricular contraction3

Systolic4

Subendocardial1

Levosimendan1

Premature contractions1

Sequential1

Perfusion1

Atrial1

Arrhythmias2

Hypertension2

Increases2

Apical1

Dysfunction1

Velocity1

Cardiomyocyte3

Contrast2

Substrate2

Mitral1

Regeneration1

Tissue2

Activation1

Patients1

Indicator1

Prevents1

Blood1