A262137 a(n) = round(1500/(n + 5)).

300, 250, 214, 188, 167, 150, 136, 125, 115, 107, 100, 94, 88, 83, 79, 75, 71, 68, 65, 62, 60, 58, 56, 54, 52, 50, 48, 47, 45, 44, 43, 42, 41, 39, 38, 38, 37, 36, 35, 34, 33, 33, 32, 31, 31, 30, 29, 29, 28, 28, 27, 27, 26, 26, 25, 25, 25, 24, 24, 23

Offset: 0

Author

Lekraj Beedassy, Sep 11 2015

Keywords

• nonn
• easy

Comments

"Fine-tuned" square counting method to directly read the heartbeat rate a(n) on EKG printout whereby in presence of similar occurring QRS wave complexes one such successive pair is considered (with the first QRS complex specifically spotted whose R wave /|\ falls sharply right on a thick marking) so that the ensuing R complex is read n smaller markings (or mm) farther off the first thick marking following the first spotted R thick-marking wave.

Sequence of first twenty entries or so is usually relevant and worth memorizing in clinical practice.

References

• Dale Dubin, Rapid Interpretation Of EKG's, pp. 89, 335. COVER Pub. FL 2000.

Links

• J. S. S. G. de Jong, P. G. Postema, ECGpedia, Rate: Fine-tuned square-counting method
• D. Dubin, Chapter 4: Rate, page 89, 335

Programs

Mathematica

Table[Round [1500/(n + 5)], {n, 0, 200}] (* Vincenzo Librandi, Sep 12 2015 *)

PARI

first(m)=vector(m,i,i--;round(1500/(i + 5))) \\ Anders Hellström, Sep 12 2015