DTS

Q: Duke treadmill score (DTS) contains all of the following EXCEPT? (select one)

A) Exercise time 

B) ST deviation 

C) Angina score 

D) Increase in heart rate

Answer: D

Duke treadmill score (DTS) is a validated treadmill score created from the data of 2758 consecutive patients seen over 11 years (1969-1980). The median age of 49 of patients with chest pain. These patients underwent both exercise treadmill testing and coronary angiography. DTS provides added independent prognostic information.

The formula for DTS is:

DTS = Exercise time (minutes) - (5 x ST deviation) - (4 x angina score)

- Exercise time is based on minutes completed on Bruce protocol (or equivalent to Bruce protocol)

- ST deviation is the maximum deviation (in mm) compared with baseline

- Angina score: 0 for no pain, 1 for nonlimiting pain, 2 for exercise limiting pain

Patients are classified as:

• Low risk, if score ≥+5
• Moderate risk, if score from -10 to +4
• High risk, if score ≤-11

Reportedly, DTS works better in females.

#cardiology

References:

1. Shaw LJ, Peterson ED, Shaw LK, Kesler KL, DeLong ER, Harrell FE Jr, Muhlbaier LH, Mark DB. Use of a prognostic treadmill score in identifying diagnostic coronary disease subgroups. Circulation. 1998 Oct 20;98(16):1622-30. doi: 10.1161/01.cir.98.16.1622. PMID: 9778327.

2. Günaydın ZY, Bektaş O, Gürel YE, Karagöz A, Kaya A, Kırış T, Zeren G, Yazıcı S. The value of the Duke treadmill score in predicting the presence and severity of coronary artery disease. Kardiol Pol. 2016;74(2):127-34. doi: 10.5603/KP.a2015.0143. Epub 2015 Jul 23. PMID: 26202537.