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Medical condition
Electrical alternans is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats and a possible wandering base-line
Electrical_alternans
Abnormal accumulation of fluid in the pericardial cavity of the heart
ECG: may present with sinus tachycardia, low voltage QRS as well as electrical alternans. Due to the fluid accumulation around the heart, the heart is further
Pericardial_effusion
Topics referred to by the same term
Alternans may refer to: Scolopendra alternans Philodes alternans Aedes alternans Mecaspis alternans Brachinus alternans Anorostoma alternans Trochalus
Alternans
Inflammation of the sac surrounding the heart due to bacterial infection
segment elevation, diffuse T wave inversion, low QRS voltage, and/or electrical alternans. Echocardiogram may be used to evaluate for fluid collection in the
Purulent_pericarditis
Examination of the heart's electrical activity
phenomena: Cardiac aberrancy Ashman phenomenon Concealed conduction Electrical alternans In 1872, Alexander Muirhead is reported to have attached wires to
Electrocardiography
Inflammation of the pericardium
cases of cardiac tamponade, EKG or Holter monitor will then depict electrical alternans indicating wobbling of the heart in the fluid filled pericardium
Pericarditis
Medical condition
Pulseless electrical activity (PEA) is a form of cardiac arrest in which the electrocardiogram shows a heart rhythm that should produce a pulse, but does
Pulseless_electrical_activity
Complications resulting from surgical incision of the pericardium
venous pressure, as well as EKG or Holter monitor findings such as electrical alternans. Physically the patients who progress to severe pericardial tamponade
Postpericardiotomy_syndrome
Insufficient blood flow due to physical obstruction
pulsus paradoxus may also be seen. Low-voltage QRS complexes and electrical alternans are signs on EKG. However, EKG may not show these findings and most
Obstructive_shock
Mnemonic
narrowing pulse pressure, muffled heart sounds, distended neck veins, electrical alternans on the electrocardiogram, or by visualization on echocardiogram.
Hs_and_Ts
Medical condition
sign is often a giveaway to the diagnosis.[citation needed] Rarely, electrical alternans may be seen, depending on the size of the effusion.[citation needed]
Acute_pericarditis
Group of medical conditions characterized by irregular heartbeat
atrioventricular conduction disturbances. Arrhythmias are due to problems with the electrical conduction system of the heart. A number of tests can help with diagnosis
Arrhythmia
Valeri, C R; Ruskin, J N; Cohen, R J (January 1988). "Electrical alternans and cardiac electrical instability". Circulation. 77 (1): 110–121. doi:10.1161/01
Pharmacological cardiotoxicity
Pharmacological_cardiotoxicity
Heart condition
electrocardiography, left axis deviation (LAD) is a condition wherein the mean electrical axis of ventricular contraction of the heart lies in a frontal plane direction
Left_axis_deviation
Periodic variation in the T wave of an electrocardiogram
outpatient basis. The test looks for the presence of repolarization alternans (T-wave alternans), which is variation in the vector and amplitude of the T wave
T_wave_alternans
Heart block in the right ventricle
branch block (RBBB) is a heart block in the right bundle branch of the electrical conduction system. During a right bundle branch block, the right ventricle
Right_bundle_branch_block
Abnormal heart rhythm due to faulty electrical connections in the heart
specific type of problem with the electrical system of the heart involving an accessory pathway able to conduct electrical current between the atria and the
Wolff–Parkinson–White syndrome
Wolff–Parkinson–White_syndrome
Irregular beating of the atria of the heart
convert the rhythm to normal sinus rhythm (known as rhythm control). Electrical cardioversion can convert AF to normal heart rhythm and is often necessary
Atrial_fibrillation
Abnormally fast rhythm of the heart's ventricles
are referred to as an electrical storm, which also occurs when one has a seizure (although this is referred to as an electrical storm in the brain). Short
Ventricular_tachycardia
Medical condition
Atrioventricular block (AV block) is a type of heart block that occurs when the electrical signal traveling from the atria, or the upper chambers of the heart, to
Atrioventricular_block
Condition involving an enlarged, ineffective heart
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Dilated_cardiomyopathy
Medical condition
atrioventricular block (AV block) is a disease of the electrical conduction system of the heart in which electrical impulses conduct from the cardiac atria to the
First-degree atrioventricular block
First-degree_atrioventricular_block
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Uremic_pericarditis
Enlargement of the heart
two-dimensional cardiothoracic ratio. Electrocardiogram: This test records the electrical activity of the heart through electrodes attached to the skin. Impulses
Cardiomegaly
Heart rate exceeding normal resting rate
rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart). Tachycardia can lead to fainting. When the
Tachycardia
Autoimmune disease resulting in uncontrollable jerking motions
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Sydenham's_chorea
Sudden or unexpected loss of heartbeat
lack of oxygen, electrolyte disturbance (such as very low potassium), electrical injury, and intense physical exercise. Cardiac arrest is diagnosed by
Cardiac_arrest
Blood clot within the heart's blood vessels
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Coronary_thrombosis
Abnormally fast heart rhythm
electrical impulses that are common to all cardiac muscle cells, have established themselves as a 'rhythm center' with a natural rate of electrical discharge
Supraventricular_tachycardia
Heart rate below the normal range
an electrical action potential that spreads across the right and left atria, causing the atrial contraction of the cardiac cycle. This electrical impulse
Bradycardia
Medical condition of the heart
referred to as cardiac flatline, asystole is the state of total cessation of electrical activity from the heart, which means no tissue contraction from the heart
Asystole
Restriction of electrical impulse flow in the heart's bundle branches
interruption in the flow of electrical impulses in either of the bundle branches of the heart's electrical system. The heart's electrical activity begins in the
Bundle_branch_block
Sudden temporary weakening of the heart muscle
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Takotsubo_cardiomyopathy
Medical condition
wherein the sinoatrial node of the heart transiently ceases to generate the electrical impulses that normally stimulate the myocardial tissues to contract and
Sinoatrial_arrest
Medical condition
the organ beats – in other words, it is the heart's "pacemaker". The electrical activity of sinus rhythm originates in the sinoatrial node and depolarizes
Junctional_rhythm
Instrument for measuring blood pressure
such as those with arteriosclerosis, arrhythmia, preeclampsia, pulsus alternans, and pulsus paradoxus, as their calculations may not be correct for these
Sphygmomanometer
Disorder of heart rhythm
natural pacemaker. This is caused by an obstruction – a block – in the electrical conduction system of the heart. Sometimes this disorder is inherited.
Heart_block
Medical condition
The electrical axis of the heart is the net direction in which the wave of depolarization travels. It is measured using an electrocardiogram (ECG). Normally
Right_axis_deviation
Abnormal heart rhythm originating from an atrial location
electrical impulse begins in the upper chambers (atria), rather than from the sinoatrial node, which is the normal origin of the heart's electrical activity
Atrial_tachycardia
Cardiac arrhythmia
beat is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fibers or group
Ectopic_beat
Lower than typical heart rate
Sinus bradycardia is a sinus rhythm with a reduced rate of electrical discharge from the sinoatrial node, resulting in a bradycardia, a heart rate that
Sinus_bradycardia
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Bigeminy
Medical condition
(genetically LQT1-6 and LQT9-16), an autosomal dominant form in which the electrical activity of the heart is affected without involving other organs. A less
Long_QT_syndrome
Medical condition
down or holding one's breath). Medications that slow or briefly halt electrical conduction through the AV node can terminate AVNRT, including adenosine
AV nodal reentrant tachycardia
AV_nodal_reentrant_tachycardia
Heart disorder in which the cardiac ventricles activate too early
ventricles are activated too early. Pre-excitation is caused by an abnormal electrical connection or accessory pathway between or within the cardiac chambers
Pre-excitation_syndrome
Medical condition
atrioventricular block (AV block) is a medical condition in which the electrical impulse generated in the sinoatrial node (SA node) in the atrium of the
Third-degree atrioventricular block
Third-degree_atrioventricular_block
Medical condition
Second-degree atrioventricular block (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria
Second-degree atrioventricular block
Second-degree_atrioventricular_block
Type of abnormal heart rhythm
recommended for immediate treatment of torsades. Electrical cardioversion – a procedure in which an electrical current is applied across the heart to temporarily
Torsades_de_pointes
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Acute decompensated heart failure
Acute_decompensated_heart_failure
Abnormal heart rhythm beginning in the atria
or has low blood pressure (unstable atrial flutter), then an urgent electrical shock to the heart to restore a normal heart rhythm is necessary. Long-term
Atrial_flutter
Branch of medicine dealing with the heart
electrophysiology is the science of elucidating, diagnosing, and treating the electrical activities of the heart. The term is usually used to describe studies
Cardiology
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Ischemic_cardiomyopathy
Study of heart disorders
event monitor recording and interpretation) Tilt table testing T-wave alternans testing Signal-averaged electrocardiogram (SAECG) interpretation, also
Clinical cardiac electrophysiology
Clinical_cardiac_electrophysiology
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Coronary_artery_ectasia
Inflammation of the heart's inner layer (endocardium)
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Endocarditis
Heart condition
rhythm. LGL syndrome was originally thought to be due to an abnormal electrical connection between the atria and the ventricles, but is now thought to
Lown–Ganong–Levine_syndrome
Hematoma usually associated with traumatic brain injury
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Subdural_hematoma
Variant of asystole
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Agonal_heart_rhythm
Fast heart rhythm associated with exacerbations of COPD
variable due to a phenomenon called wandering atrial pacemaker (WAP). The electrical impulse is generated at a different focus within the atria of the heart
Multifocal_atrial_tachycardia
Elevation of the ST segment on an electrocardiogram
ST elevation, loss of S wave, and T wave inversion. Weakening of the electrical activity of the cardiac muscles causes the decrease in height of the R
ST_elevation
Abnormal fast heart rhythm
pathway. During AVRT, the electrical signal passes in the normal manner from the AV node into the ventricles. Then, the electrical impulse pathologically
Atrioventricular reentrant tachycardia
Atrioventricular_reentrant_tachycardia
Rare autosomal dominant genetic disorder
predominant features of Andersen–Tawil syndrome include disturbances of the electrical function of the heart characterised by an abnormality seen on an electrocardiogram
Andersen–Tawil_syndrome
Skipped beat with atrial origin
supraventricular extrasystole (SVES) is an extrasystole or premature electrical impulse in the heart, generated above the level of the ventricle. This
Premature_atrial_contraction
Chest discomfort due to disorder of the heart muscles
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Angina
Medical condition
there is normal electrical conduction in the heart. During an episode of AVRT caused by PJRT, the accessory pathway conducts electrical activity from the
Permanent junctional reciprocating tachycardia
Permanent_junctional_reciprocating_tachycardia
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Carditis
Premature heartbeat
premature complexes or junctional extrasystole, are premature cardiac electrical impulses originating from the atrioventricular node of the heart or "junction"
Premature junctional contraction
Premature_junctional_contraction
Skipped human heartbeat with ventricular origin
as palpitations in the chest. PVCs do not usually pose any danger. The electrical events of the heart detected by the electrocardiogram (ECG) allow a PVC
Premature ventricular contraction
Premature_ventricular_contraction
Rapid, irregular contraction of muscle fibers
In this condition the normal electrical pulses coming from the sinoatrial node are overwhelmed by disorganized electrical impulses usually originating
Fibrillation
Failure of the heart to provide sufficient blood flow throughout the body
mechanism is based on stimulation of the cardiac muscle by nonexcitatory electrical signals, which are delivered by a pacemaker-like device. CCM is particularly
Heart_failure
Rapid quivering of the ventricles of the heart
in which the ventricles of the heart quiver. It is due to disorganized electrical activity. Ventricular fibrillation can cause cardiac arrest and loss of
Ventricular_fibrillation
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Myopericarditis
Medical condition
infarction Extensive coronary artery disease Primary disease of the cardiac electrical conduction system Long standing hypertension leading to aortic root dilatation
Left_bundle_branch_block
Higher than typical heart rate
tachycardia is a sinus rhythm of the heart, with an increased rate of electrical discharge from the sinoatrial node, resulting in a tachycardia, a heart
Sinus_tachycardia
Interruption of cardiac blood supply
and coronary angiography. An ECG, which is a recording of the heart's electrical activity, may confirm an ST elevation MI (STEMI), if ST elevation is present
Myocardial_infarction
Medical condition
heart's normal rhythm. This condition is characterized by uncoordinated electrical activity in the heart's upper chambers (the atria), which causes the heartbeat
Familial_atrial_fibrillation
Post-streptococcal inflammatory disease
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Rheumatic_fever
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Heart failure with preserved ejection fraction
Heart_failure_with_preserved_ejection_fraction
Fibrous tissue in the heart
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Myocardial_scarring
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
De_Winter_syndrome
Heart condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Wellens'_syndrome
Chest pain due to heart muscles that is easily provoked
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Unstable_angina
Medical diagnostic method
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
High_frequency_QRS
Disease of the heart muscle
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Cardiomyopathy
Syndrome where the sinus heart rate is inexplicably faster than expected
individual patients' underlying mechanistic etiologies may differ. Over 15 electrical currents tightly control the sinus node. The calcium clock and the funny
Inappropriate sinus tachycardia
Inappropriate_sinus_tachycardia
Medical condition
of the atrioventricular node. This dysrhythmia also may occur when the electrical impulses from the SA node fail to reach the AV node because of SA or AV
Junctional_escape_beat
Dysfunction of the heart muscles due to insufficient blood flow
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Acute_coronary_syndrome
Enlargement of the heart muscle
the heart being less able to pump blood effectively and also may cause electrical conduction problems. Specifically affected are the bundle branches that
Hypertrophic_cardiomyopathy
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Myocardial_rupture
Disease involving heart or blood vessels
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Cardiovascular_disease
Buildup of fluid around the heart
left untreated may lead to cardiac arrest (often presenting as pulseless electrical activity). The decrease in stroke volume can also ultimately lead to a
Cardiac_tamponade
Excess deposition of extracellular matrix in the cardiac muscle
electrophysiology with three-dimensional murine heart reconstruction to reveal electrical coupling between cell types". Nature Cardiovascular Research: 1–21. doi:10
Cardiac_fibrosis
Reduction of blood flow to the heart
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Coronary_artery_disease
Medical condition
problem with the electrical conduction of the heart, specifically the three fascicles of the bundle branches that carry electrical signals from the atrioventricular
Trifascicular_block
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Idiopathic giant-cell myocarditis
Idiopathic_giant-cell_myocarditis
Cardiac chest pain at any time, not just periods of exertion
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Variant_angina
Inflammation of the heart muscle
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Myocarditis
Medical condition
normally be required to undergo an electrocardiogram, which monitors electrical activity within the heart and shows abnormalities when a cardiac aneurysm
Ventricular_aneurysm
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Pulmonary_heart_disease
Medical condition
Right axis deviation Left axis deviation QT Short QT syndrome T T wave alternans ST J wave ST elevation ST depression Strain pattern Cardiomegaly Ventricular
Left_atrial_enlargement
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ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
ELECTRICAL ALTERNANS
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