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What Causes Sinus Tachycardia?

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Posted on Tue, 21 Apr 2015
Question: Hello Doctor,

A year ago, when I underwent an ECG it was detected as Sinus Tachycardia, T inversion in Lead III, so I underwent a stress test which marked negative for ishaemia, but T inversion was still there, I underwent Pulmonary Function Test there it was figured out I have a Mild Asthma.

1) Can Asthma be the reason for T Inversion ?

Secondly I decided to improve my lifestyle like eating less salt and less oil followed by exercise, after 6 months I did my ECG it came back Borderline ECG, 800 Sinus rythm normal, Remarks : Within Normal Limits, Followed by Echo which was excellent, moreover I am less asthmatic these days I mean I take Ventorlin inhaler once in a day if I feel Asthmatic.
The Echo and ECG both came back normal, and I do not have any symptoms as such but still worried about the report.

Should I be still worried ?
doctor
Answered by Dr. Drkaushal85 (12 hours later)
Brief Answer:
No need to worry for ECG and 2d echo.

Detailed Answer:
Hello dear, thanks for your question on HCM.
No need to worry at all for your T wave inversion in lead III .
T inversion is significant only if it is more than 1 mm and in at least 2 corresponding leads.
Since you had T inversion in isolated III rd lead, no need to worry at all.
Sometimes non significant T wave inversion in isolated lead is normal.
And you have confirmed by 2d echo and it came normal. So no need to worry for ECG and 2d echo.
And asthma can cause sinus tachycardia but can not cause T wave inversion.
Ventorlin is having levosalbutamol and it is short acting beta 2 agonist (SABA). It's action lasts for only 2-3 hours.
And it is not first line treatment for asthma.
In my opinion you should start combination of inhaled corticosteroid (ICS) and long acting beta 2 agonist (LABA).
Both are treatment of choice for asthma and give you better symptomatic control.
Hope I have solved your query.
I will be happy to help you further.
Wish you good health.
Thanks.
Note: For further queries related to coronary artery disease and prevention, click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Drkaushal85

Pulmonologist

Practicing since :2008

Answered : 15003 Questions

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What Causes Sinus Tachycardia?

Brief Answer: No need to worry for ECG and 2d echo. Detailed Answer: Hello dear, thanks for your question on HCM. No need to worry at all for your T wave inversion in lead III . T inversion is significant only if it is more than 1 mm and in at least 2 corresponding leads. Since you had T inversion in isolated III rd lead, no need to worry at all. Sometimes non significant T wave inversion in isolated lead is normal. And you have confirmed by 2d echo and it came normal. So no need to worry for ECG and 2d echo. And asthma can cause sinus tachycardia but can not cause T wave inversion. Ventorlin is having levosalbutamol and it is short acting beta 2 agonist (SABA). It's action lasts for only 2-3 hours. And it is not first line treatment for asthma. In my opinion you should start combination of inhaled corticosteroid (ICS) and long acting beta 2 agonist (LABA). Both are treatment of choice for asthma and give you better symptomatic control. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.