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  2. Premature ventricular contraction - Wikipedia

    en.wikipedia.org/wiki/Premature_ventricular...

    PVCs may be found incidentally on cardiac tests such as a 12-lead electrocardiogram (ECG/EKG) performed for another reason. In those with symptoms suggestive of premature ventricular complexes, the ECG/EKG is the first investigation that may identify PVCs as well as other cardiac rhythm issues that may cause similar symptoms.

  3. Photoplethysmogram - Wikipedia

    en.wikipedia.org/wiki/Photoplethysmogram

    The height of AC component of the photoplethysmogram is proportional to the pulse pressure, the difference between the systolic and diastolic pressure in the arteries. As seen in the figure showing premature ventricular contractions (PVCs), the PPG pulse for the cardiac cycle with the PVC results in lower amplitude blood pressure and a PPG.

  4. Premature heart beat - Wikipedia

    en.wikipedia.org/wiki/Premature_heart_beat

    Premature heart beats come in two different types: premature atrial contractions and premature ventricular contractions. Often they cause no symptoms but may present with fluttering in the chest or a skipped beat. They typically have no long-term complications. They most often happen naturally but may be associated with caffeine, nicotine, or ...

  5. Cardiology diagnostic tests and procedures - Wikipedia

    en.wikipedia.org/wiki/Cardiology_diagnostic...

    A variety of blood tests are available for analyzing cholesterol transport behavior, HDL, LDL, triglycerides, lipoprotein little a, homocysteine, C-reactive protein, blood sugar control: fasting, after eating or averages using glycated albumen or hemoglobin, myoglobin, creatine kinase, troponin, brain-type natriuretic peptide, etc. to assess the evolution of coronary artery disease and ...

  6. Left axis deviation - Wikipedia

    en.wikipedia.org/wiki/Left_axis_deviation

    The hexaxial reference system is a diagram that is used to determine the heart's electrical axis in the frontal plane.. In electrocardiography, left axis deviation (LAD) is a condition wherein the mean electrical axis of ventricular contraction of the heart lies in a frontal plane direction between −30° and −90°.

  7. Heart rate turbulence - Wikipedia

    en.wikipedia.org/wiki/Heart_rate_turbulence

    While studying PVC characteristics, Schmidt and his colleagues noticed that heart rate seemed to speed up after a PVC. To clarify, they listed the time from one heartbeat's R-wave to the next R-wave (called RR intervals) and synchronized these lists to the time of the PVC beat and averaged the values in the list. A plot of this averaged RR ...

  8. OB/GYNs Explain When You Should (and Shouldn’t) Worry ... - AOL

    www.aol.com/ob-gyns-explain-shouldn-t-151600275.html

    Here, gynecologists to explain when you should (and shouldn’t) worry about menstrual clots. Are blood clots normal during your period? Most of the time, blood clots are simply just a part of ...

  9. Concealed conduction - Wikipedia

    en.wikipedia.org/wiki/Concealed_conduction

    The term "concealed" is in reference to that the conduction is not observable by electrocardiogram. A common example would be an interpolated PVC (a type of premature ventricular contraction) during normal sinus rhythm; the PVC does not cause an atrial contraction, because the retrograde impulse from the PVC does not completely penetrate the AV ...