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2. Wiggers diagram - Wikipedia

   en.wikipedia.org/wiki/Wiggers_diagram

   A Wiggers diagram modified from [1]. A Wiggers diagram, named after its developer, Carl Wiggers, is a unique diagram that has been used in teaching cardiac physiology for more than a century.

3. Cardiac cycle - Wikipedia

   en.wikipedia.org/wiki/Cardiac_cycle

   The programmed delay at the AV node also provides time for blood volume to flow through the atria and fill the ventricular chambers—just before the return of the systole (contractions), ejecting the new blood volume and completing the cardiac cycle. [8] (See Wiggers diagram: "Ventricular volume" tracing (red), at "Systole" panel.)

4. Rhythm interpretation - Wikipedia

   en.wikipedia.org/wiki/Rhythm_interpretation

   There are 6 different sinus arrhythmia. [1] [2]A normal heart should have a normal sinus rhythm, this rhythm can be identified by a ventricular rate of 60-100 bpm, at a regular rate, with a normal PR interval (0.12 to 0.20 second) and a normal QRS complex (0.12 second and less).

5. Fourth heart sound - Wikipedia

   en.wikipedia.org/wiki/Fourth_heart_sound

   The fourth heart sound or S 4 is an extra heart sound that occurs during late diastole, immediately before the normal two "lub-dub" heart sounds (S 1 and S 2).It occurs just after atrial contraction and immediately before the systolic S 1 and is caused by the atria contracting forcefully in an effort to overcome an abnormally stiff or hypertrophic ventricle.

6. Template:Ventricular system - Wikipedia

   en.wikipedia.org/wiki/Template:Ventricular_system

   {{Ventricular system | state = collapsed}} will show the template collapsed, i.e. hidden apart from its title bar. {{Ventricular system | state = expanded}} will show the template expanded, i.e. fully visible. This template is a navigation box relating to anatomy that provides links to related topics. When editing the links in this template:

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8. Heart sounds - Wikipedia

   en.wikipedia.org/wiki/Heart_sounds

   The third heart sound, or S 3 is rarely heard, and is also called a protodiastolic gallop, ventricular gallop, or informally the "Kentucky" gallop as an onomatopoeic reference to the rhythm and stress of S1 followed by S2 and S3 together (S1=Ken; S2=tuck; S3=y). [2] "lub-dub-ta" or "slosh-ing-in" If new, indicates heart failure or volume overload.

9. Ventricular flutter - Wikipedia

   en.wikipedia.org/wiki/Ventricular_flutter

   Ventricular flutter is an arrhythmia, more specifically a tachycardia affecting the ventricles with a rate over 250-350 beats/min, and one of the most indiscernible. It is characterized on the ECG by a sinusoidal waveform without clear definition of the QRS and T waves.