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  2. End-systolic volume - Wikipedia

    en.wikipedia.org/wiki/End-systolic_volume

    End-systolic volume. End-systolic volume ( ESV) is the volume of blood in a ventricle at the end of contraction, or systole, and the beginning of filling, or diastole . ESV is the lowest volume of blood in the ventricle at any point in the cardiac cycle . The main factors that affect the end-systolic volume are afterload and the contractility ...

  3. Stroke volume - Wikipedia

    en.wikipedia.org/wiki/Stroke_volume

    Stroke volume. In cardiovascular physiology, stroke volume ( SV) is the volume of blood pumped from the ventricle per beat. Stroke volume is calculated using measurements of ventricle volumes from an echocardiogram and subtracting the volume of the blood in the ventricle at the end of a beat (called end-systolic volume [ note 1]) from the ...

  4. End-diastolic volume - Wikipedia

    en.wikipedia.org/wiki/End-diastolic_volume

    End-diastolic volume. In cardiovascular physiology, end-diastolic volume ( EDV) is the volume of blood in the right or left ventricle at end of filling in diastole which is amount of blood present in ventricle at the end of diastole. [ 1] Because greater EDVs cause greater distention of the ventricle, EDV is often used synonymously with preload ...

  5. Erdős–Straus conjecture - Wikipedia

    en.wikipedia.org/wiki/Erdős–Straus_conjecture

    2 mod 3 (above), 3 mod 4, 2 or 3 mod 5, 3, 5, or 6 mod 7, or; 5 mod 8. Combinations of Mordell's identities can be used to expand for all except possibly those that are 1, 121, 169, 289, 361, or 529 mod 840. The smallest prime that these identities do not cover is 1009.

  6. Fermat's theorem on sums of two squares - Wikipedia

    en.wikipedia.org/wiki/Fermat's_theorem_on_sums_of...

    On the other hand, the primes 3, 7, 11, 19, 23 and 31 are all congruent to 3 modulo 4, and none of them can be expressed as the sum of two squares. This is the easier part of the theorem, and follows immediately from the observation that all squares are congruent to 0 (if number squared is even) or 1 (if number squared is odd) modulo 4.

  7. Method of successive substitution - Wikipedia

    en.wikipedia.org/wiki/Method_of_successive...

    4j ≡ 2 (mod 6) We simplify by dividing by the greatest common divisor of 4,2 and 6. Division by 2 yields: 2j ≡ 1 (mod 3) The Euclidean modular multiplicative inverse of 2 mod 3 is 2. After multiplying both sides with the inverse, we obtain: j ≡ 2 × 1 (mod 3) or j ≡ 2 (mod 3) For the above to be true: j = 2 + 3k for some integer k.

  8. Bruce protocol - Wikipedia

    en.wikipedia.org/wiki/Bruce_protocol

    Every 3 min the speed & incline of the treadmill are increased. [2] There are 7 such stages and only very fit athletes can complete all 7 stages. The modified Bruce Protocol is an alteration in the protocol so that the treadmill is initially horizontal rather than uphill, with the 1st few intervals increasing the treadmill slope only.

  9. Quadratic reciprocity - Wikipedia

    en.wikipedia.org/wiki/Quadratic_reciprocity

    The number of nonresidues found will be even when m ≡ 0, 1 (mod 4), and it will be odd if m ≡ 2, 3 (mod 4). Gauss's fourth proof consists of proving this theorem (by comparing two formulas for the value of Gauss sums) and then restricting it to two primes.