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Tachycardia: Difference between revisions
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→Differentiation between SVT and VT
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===Definitions=== | ===Definitions=== | ||
'''Small complex tachycardia:''' QRS duration < 120 ms. | |||
A | |||
A small complex tachycardia is most likely to be a SVT. However, also a septal VT or His-tachycardia can appear as a small complex tachycardia. | |||
'''Broad complex tachycardia:''' QRS duration > 120 ms. | |||
A broad complex tachycardia can be due to a SVT with aberration, pre-exited tachycardia (eg antidrome re-entry tachycardia) or VT. | |||
===Differentiation=== | ===Differentiation=== | ||
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===Treatment=== | ===Treatment=== | ||
'''Haemodynamical instability (systolic blood pressure less than 100 mmHg):''' | |||
* | *electrical cardioversion | ||
'''Haemodynamical stability in a regular small complex tachycardia:''' | |||
*Carotid massage (after palpation and ausculatation of carotid arteries for exclusion of carotid occlusion/stenosis) | |||
*Vasalva manoeuvre | |||
*Adenosine bolus (if patient is not asthmatic or having COPD) | |||
*Verapamil (if patient is not having systolic heart failure) | |||
*Beta-blocker (if patient is not having systolic heart failure) | |||
==References== | ==References== | ||