sinus bradycardia


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Related to sinus bradycardia: sinus arrhythmia, Sinus tachycardia

bradycardia

 [brad″e-kahr´de-ah]
slowness of the heartbeat, so that the pulse rate is less than 60 per minute. This can occur in normal persons, particularly during sleep; trained athletes also usually have slow pulse and heart rates. adj., adj bradycar´diac.
fetal bradycardia a fetal heart rate of less than 120 beats per minute, generally associated with hypoxia; it is usually due to placental insufficiency; it may also result from transfer of local anesthetics or beta-adrenergic blocking agents, and rarely to heart block associated with congenital heart disease or maternal collagen vascular disease.
nodal bradycardia bradycardia in which the stimulus of the heart's contraction arises in the atrioventricular node or common bundle.
sinoatrial bradycardia (sinus bradycardia) a slow sinus rhythm, with a heart rate of less than 60 beats per minute in an adult; it is common in young adults and in athletes but is also a manifestation of some disorders.
bradycardia-tachycardia syndrome any cardiac dysrhythmia characterized by alternating slow and fast heart rates, often resulting in hemodynamic compromise. See also sick sinus syndrome.

si·nus bra·dy·car·di·a

bradycardia originating in the normal sinus pacemaker.

sinus bradycardia

A heart rhythm caused by sinus-node dysfunction (sick sinus syndrome), which is characterised by a rhythm of less than 60 beats/minute.

Clinical findings
Lightheadedness, dizziness, hypotension and syncope.

Aetiology
Vagal hypertonicity, hypothermia, hypothyroidism, SA node disease, drugs (e.g., digitalis, beta blockers, calcium channel blockers), viral myocarditis or bacterial endocarditis.

EKG
Normal P waves, P-R interval of 0.12–0.20 seconds, QRS complex < 0.12 seconds.

sinus bradycardia

Cardiology Sinus-node dysfunction–sick sinus syndrome characterized by a normal P-wave axis of < 60 beats/min EKG Every P wave is followed QRS complexes , or at < 50 beats/min. See Sick sinus syndrome. Cf Sinus tachycardia.

si·nus bra·dy·car·di·a

(sī'nŭs brad'ē-kahr'dē-ă)
A heart rate less than 60 beats per minute with a normal rhythm.

sinus bradycardia

A slow, regular, heart rate resulting from a low rate of pacing by the SINOATRIAL NODE. The heart rate is less than 60 beats per minute. Sinus bradycardia is a normal, healthy feature of high physical fitness but may also occur in conditions such as HYPOTHYROIDISM in which the metabolic rate is reduced. It may also be caused by beta-blockers and other drugs.
References in periodicals archive ?
This case report reveals a neglected cause of sinus bradycardia, suggesting that awareness is needed for "hidden" medications, like beta-blocker containing eye drops, in order to avoid unnecessary interventions, like placing a permanent pacemaker for a drug induced symptomatic sinus bradycardia.
Severe sinus bradycardia had an incidence of 0.0, 6.7, and 24.0% in groups I, II, and III, respectively; the incidence in group III was higher than that in group I (P<0.05), and there was no significant difference between groups I and II (Table 3).
Marked sinus bradycardia (as low as 34 beats/min) in a patient with a severe form of hemorrhagic fever with renal syndrome (acute renal failure) has been reported (9).
He has sinus bradycardia which means the heart beats slower than average.
The US president has a heart arrhythmia called sinus bradycardia, that means his heart beats more slowly than the average person's, say doctors.
Sinus bradycardia. Sinus bradycardia is characterized by a sinus rate that is below the normal for age in adults, bradycardia is defined as a rate less than 60, but because of the variability in heart rates in the pediatric patient, one standard rate cannot define bradycardia for children.
On arrival in the ED, physical examination identified sinus bradycardia (54 bpm); temperature of 96.1 F (35.6 C); and miotic pupils.
His electrocardiogram (ECG) showed sinus bradycardia at 53 beats per minute, peaked T waves, 1 mm ST-segment elevation in leads II, III, and aVF, and 2 mm ST elevation in V3 (Figure 1).
Seventy (28%) out of 250 pigeons showed electrocardiographic abnormalities as Sinus tachycardia (30), sinus bradycardia (02), atrial fibrillation/flutter (12), ventricular premature complexes (03), ventricular tachycardia (8), ventricular flutter (2), ventricular asystole (2), 2nd degree heart block (2), bundle branch block (2), low voltage complexes (3) and Ta wave (4).
Among the arrhythmias, sinus tachycardia was seen in 24% of cases, sinus bradycardia in 10% cases.
The topics which are covered in the Final Year curriculum in the Wards are Basics of ECG, Basics of X-Rays, How to do an ECG, Viewing of Chest X-ray, CVP line, following the list of long and short cases, Rate calculation Sinus Tachycardia and Sinus Bradycardia, Orientation of X-Rays and their clinical implications, double lumen catheter, practice of rate calculation for regular and irregular rhythms, Inspiratory and Expiratory Chest Films and Cardiothoracic Ratio, LP needle, Introduction to Cardiac Axis Left, right and normal cardiac Axis, Quality of X-rays, Foley's Catheter, Pleural Effusion, introduction to Regular and Irregular Rhythms, how to pass NG tube,
The types of arrhythmia included sinus bradycardia, atrial premature beats, bundle branch block, and different degrees of atrioventricular block.