4,200
edits
Supraventricular Rhythms: Difference between revisions
m
no edit summary
mNo edit summary |
mNo edit summary |
||
| Line 1: | Line 1: | ||
===Sinustachycardia=== | |||
{{Arrhythmias| | |||
| name = Sinustachycardia | |||
| locatieImage = [[Image:Rhythm_tachycardia.png|250px]] | |||
| atrial_frequency = 100-180 bpm | |||
| ventricular_frequency = same | |||
| origin = sinus node | |||
| p_wave = positive in II, AVF | |||
| adenosine = no (can lead to temporary AV block) | |||
| example = | |||
}} | |||
In sinustachycardia the sinus node fires between 100 and 180 beats per minute and thus faster than normally. The maximal heartrate decreases with age from around 200 bpm to 140 bpm. The maximal heartrage can be estimated by subtracting the age in years from 210. Sinustachycardia normally has a gradual start and ending. Most often sinustachycardia is caused by an increase in the body's demand for oxygen, such as during exercise, stress, infection, blood loss and hyperthyroidism. It can also express an effort of the heart to compensate for a reduced stroke volume, as occurs during cardiomyopaty. | |||
{{clr}} | |||
===Atrial flutter=== | ===Atrial flutter=== | ||
{{Arrhythmias| | {{Arrhythmias| | ||