Cardiac arrhythmia

sudden stop in effective blood flow due to the failure of the heart to contract effectively

Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. Heart rates above the resting rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart).

abnormal heart rhythm characterized by rapid and irregular beating

Bradycardia, from Ancient Greek βραδύς (bradús), meaning "slow", and καρδία (kardía), meaning "heart", also called bradyarrhythmia, is a resting heart rate under 60 beats per minute (BPM). While bradycardia can result from various pathological processes, it is commonly a physiological response to cardiovascular conditioning or due to asymptomatic type 1 atrioventricular block.

disorganized electrical activity in the ventricles

Palpitations occur when a person becomes aware of their heartbeat. The heartbeat may feel hard, fast, or uneven in their chest.

heart conduction disease characterized by abnormal ECG findings

congenital syndrome characterized by additional electrical pathways causing electrical conduction problems in the heart, leading to sporadic episodes of tachycardia and other symptoms.

condition involving delayed repolarization of the heart during the heartbeat cycle

Asystole (from New Latin, from Greek privative a| 'not', 'without' + 'contraction') is the absence of ventricular contractions in the context of a lethal heart arrhythmia, in contrast to an induced asystole on a cooled patient on a heart-lung machine, and general anesthesia during surgery necessitating stopping the heart. Asystole is the most serious form of cardiac arrest and is usually irreversible. Also 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 muscle and therefore no bloo

fast heart rhythm that originates in one of the ventricles of the heart

abnormally fast heart rhythm arising from improper electrical activity in the upper part of the heart

type of abnormal heart rhythm that can lead to sudden cardiac death

heart conduction disease that is characterized by the impairment of the conduction between the atria and ventricles of the heart

abnormal heart rhythm that starts in the atrial chambers of the heart

periodic fainting spell in which there is a periodic onset and offset of blockage of heart due to disorder of heart rhythm

heart rhythm disorder

heart block in the electrical conduction system

heart rate greater than 100 beats/min (bpm)

Fibrillation is the rapid, irregular, and unsynchronized contraction of muscle fibers. An important occurrence is with regard to the heart.

Human disease

syndrome that involves pre-excitation of the ventricles due to an accessory pathway providing an abnormal electrical communication from the atria to the ventricles

cardiac arrest with electrical signal but insufficient pumping

cardiovascular system disease that involves the heart's electrical conduction system

Human disease

type of supraventricular tachycardia (SVT), meaning that it originates from a location within the heart above the bundle of His.

medical condition

heart conduction disease that is characterized by heart arrhythmia defined as a short QT interval on an EKG (less than 300 ms) that does not significantly change with heart rate, tall and peaked T waves, and a structurally normal heart

medical condition

heart injury

medical condition

sinus bradycardia is a sinus rhythm with a rate that is lower than normal

disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles.

Bigeminy is a cardiac arrhythmia in which there is a single ectopic beat, or irregular heartbeat, following each regular heartbeat. Most often this is due to ectopic beats occurring so frequently that there is one after each sinus beat, or normal heartbeat. The two beats are figuratively similar to two twins (hence bi- + gemini). For example, in ventricular bigeminy, a sinus beat is shortly followed by a premature ventricular contraction (PVC), a pause, another normal beat, and then another PVC. In atrial bigeminy, the other "twin" is a premature atrial contraction (PAC).

abnormal heart rhythm, specifically a type of supraventricular tachycardia

medical condition in which the impulse generated in the sinoatrial node (SA node) in the atrium of the heart does not propagate to the ventricles

disorder characterized by an abnormal heart rhythm (arrhythmia)

disease of the electrical conduction system of the heart in which the PR interval is lengthened beyond 0.20 seconds

medical condition

medical condition

ventricular rhythm with a rate of between 40 and 120 beats per minute

it is an atrial arrhythmia that occurs when the natural cardiac pacemaker site shifts between the sinoatrial node, the atria, and/or the atrioventricular node.

Human disease

rare type of cardiac arrhythmia, within the category of supraventricular tachycardia

arrhythmia, more specifically a tachycardia affecting the ventricles with a rate over 250-350 beats/min

Parasystole is a kind of arrhythmia caused by the presence and function of a secondary pacemaker in the heart, which works in parallel with the SA node. Parasystolic pacemakers are protected from depolarization by the SA node by some kind of entrance block. This block can be complete or incomplete.

medical condition

medical condition

Human disease

irregular heart rate caused by abnormal function of the sinoatrial node

form of tachycardia which begins and ends in an acute (or paroxysmal) manner

electrical impulse is delayed or blocked on the way to the atria, thus delaying the atrial bea

medical condition

regular cardiac rhythm that occurs when the AV (atrioventricular) junction takes over as the heart's pacemaker instead of the sinoatrial node

rare syndrome with irregular beating of the heart in patients recovering from heart surgery

electrocardiogram feature

type of rapid heartbeat

Electrocardiographic phenomenon indicative of fluid in the pericardium