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Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.
Bifascicular block is a combination of right bundle branch block and either left anterior fascicular block or left posterior fascicular block. Conduction to the ventricle would therefore be via the remaining fascicle. The ECG will show typical features of RBBB plus either left or right axis deviation. [7] [8]
Ectopic 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 of fibers outside the region in the heart muscle ordinarily responsible for impulse formation (i.e., the sinoatrial node).
These impulses are recorded by an ECG, which shows how fast, the rhythm, intensity and timing of the electrical impulses as they travel through the heart. [51] Electrocardiography shows right ventricular hypertrophy (RVH), along with right axis deviation. [24] RVH is noted on EKG as tall R-waves in lead V1 and deep S-waves in lead V5–V6. [52]
a stimulator to electrically excite the heart and control the heart rate; ablation equipment to destroy abnormal tissue; an electroanatomic mapping system that tracks and records the catheter position in 3D and associated electrical signals; ready access to cardiac medications such as adenosine, atropine, dopamine, and isoproterenol
Heart disease was excluded after physical examination, chest x-ray, ECG, echocardiography, maximal exercise stress test, right- and left-heart catheterization and coronary angiography. [30] In 122,043 United States Air Force flyers and cadet applicants during approximately 48 seconds of ECG 0.78% (952 males) had PVC within all age groups, but ...
An example of an ECG tracing typical of uncommon AV nodal reentrant tachycardia. Highlighted in yellow is the P wave that falls after the QRS complex. Specialty: Cardiology: Symptoms: Palpitations, chest tightness, neck pulsation: Diagnostic method: electrocardiogram, electrophysiological study: Differential diagnosis
A BCG scale is able to show a person's heart rate as well as their weight. [ citation needed ] The term ballistocardiograph originated from the Roman ballista , which is derived from the Greek word ballein (to throw), a machine for launching missiles, plus the Greek words for heart and writing.