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Premature atrial contraction

The uses of the antiarrhythmic drug are given in the Summaiy Drug Table Antiarrhythmic Drug3. In general these drugp are used to prevent and treat cardiac arrhythmias, such as premature ventricular contractions (PVCs), ventricular tachycardia (VT), premature atrial contractions (PACs), paroxysmal atrial tachycardia (PAT), atrial fibrillation, and atrial flutter. Some of the antiarrhythmic dru are used for other... [Pg.370]

Abnormal initiation of electrical impulses occurs as a result of abnormal automaticity. If the automaticity of the SA node increases, this results in an increased rate of generation of impulses and a rapid heart rate (sinus tachycardia). If other cardiac fibers become abnormally automatic, such that the rate of initiation of spontaneous impulses exceeds that of the SA node, other types of tachyarrhythmias may occur. Many cardiac fibers possess the capability for automaticity, including the atrial tissue, the AV node, the Purkinje fibers, and the ventricular tissue. In addition, fibers with the capability of initiating and conducting electrical impulses are present in the pulmonary veins. Abnormal atrial automaticity may result in premature atrial contractions or may precipitate atrial tachycardia or atrial fibrillation (AF) abnormal AV nodal automaticity may result in junctional tachycardia (the AV node is also sometimes referred to as the AV junction). Abnormal automaticity in the ventricles may result in ventricular premature depolarizations (VPDs) or may precipitate ventricular tachycardia (VT) or ventricular fibrillation (VF). In addition, abnormal automaticity originating from the pulmonary veins is a precipitant of AF. [Pg.110]

MRI Magnetic resonance imaging PAC Premature atrial contraction... [Pg.1556]

Procainamide is an effective antiarrhythmic agent when given in sufficient doses at relatively short (3-4 hours) dosage intervals. Procainamide is useful in the treatment of premature atrial contractions, paroxysmal atrial tachycardia, and atrial fibrillation of recent onset. Procainamide is only moderately effective in converting atrial flutter or chronic atrial fibrillation to sinus rhythm, although it has... [Pg.173]

Lodeiro JG, Feinstein SJ, Lodeiro SB. Fetal premature atrial contractions associated with hydralazine. Am J Obstet Gynecol 1989 160(l) 105-7. [Pg.1702]

Procainamide is a class I anti-arrhythmic agent with actions similar to those of quinidine. It depresses myocardial automaticity and excitability and increases the effective refractory period of the atrium. It finds its application towards the suppression of ventricular extrasystoles and paroxysmal ventricular tachycardia. It is also useful in the control and management ofatrialfibrillation and premature atrial contractions. [Pg.360]

Fig. 9.1 After a premature atrial contraction (PAC), there is sinus node arrest for at least 5 s. After a long asystoUe period, the first escape heat is a junetional beat with retrograde atrial activation. Fig. 9.1 After a premature atrial contraction (PAC), there is sinus node arrest for at least 5 s. After a long asystoUe period, the first escape heat is a junetional beat with retrograde atrial activation.
Premature atrial contractions are introduced during sinus rhythm, and the interval between the premature beat and the subsequent sinus beat is measured. This interval will be the sum of conduction time into and out of the sinus node... [Pg.385]

Nonconducted No QRS complex follows premature atrial contraction (PAC). [Pg.54]

Distinguishing nonconducted premature atrial contractions from sinoatrial block... [Pg.55]

To differentiate between nonconducted premature atrial contractions (PACs) and sinoatrial (SA) block, check the following ... [Pg.55]

Sudden onset, typically started by premature atrial contraction may start and stop abruptly. [Pg.60]

May be difficult to differentiate wandering pacemaker from premature atrial contractions. [Pg.80]

Because premature atrial contractions (PACs) are common, you may miss a wandering pacemaker rhythm unless you examine the rhythm strip carefully. You may find it helpful to look at a rhythm strip that s longer than 6 seconds. [Pg.82]

An isolated nonconducted P wave (a P wave not followed by a QRS complex, as shown in the shaded areas below) may result from second-degree atrioventricular (AV) block type 11 or a nonconducted premature atrial contraction (RAQ. Thinking a patient has nonconducted PACs when he really has AV block can have serious consequences. The former is usually benign, but the latter can be life-threatening. [Pg.151]

Lead II or the best lead that clearly shows P waves and the QRS complex may be used for sinus node arrhythmias, premature atrial contractions, and atrioventricular block... [Pg.280]

Premature atrial contractions II or lead that shows best P waves... [Pg.280]

See other pages where Premature atrial contraction is mentioned: [Pg.756]    [Pg.324]    [Pg.158]    [Pg.501]    [Pg.270]    [Pg.457]    [Pg.68]    [Pg.7]    [Pg.36]    [Pg.53]    [Pg.54]    [Pg.54]    [Pg.55]    [Pg.55]    [Pg.57]    [Pg.72]    [Pg.82]   
See also in sourсe #XX -- [ Pg.110 ]

See also in sourсe #XX -- [ Pg.3 , Pg.9 ]

See also in sourсe #XX -- [ Pg.54 , Pg.55 , Pg.56 ]



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