Tag Archives: Conditions and Diseases


Electrical Activity and EKG

The Cardiac Action Potential Has a Prolonged Refractory Period

  • Heart action potential has a prolonged spike (depolarized)
  • Membrane is refractory for a long time
  • This prevents summation and gives the heart time to fill

All Parts of the Heart Beat Spontaneously

  • Heart muscle does not require stimulation by a nerve
  • Nerves usually inhibit the heart beat; cutting the nerves -> heart speeds up
  • Beat originates as a depolarization in the heart muscle cell itself (self stimulation)
  • All parts of the heart can beat spontaneously

NACO-Research Fellowship Scheme, India


National AIDS Control Organisation


PG Students enrolled for full-time MD/MPhil/PhD degree program in relevant disciplines from any recognized Indian University/Institute below 35 years.


NACO invites applications from young researchers to provide opportunity and incentive to pursue quality and need based research in HIV/AIDS in bio-medical/clinical, epidemiological, behavioral and social disciplines.NACO Research Fellowship grant will be given to the respective Institution/Department in full for the awardees students. NACO will award up to 20 Fellowships per year for financial assistance. NACO will consider applications received through proper channel only with a certificate on official letter-head duly recommended by the Guide/Supervisor and Head of the Department/Institute where the candidate proposes to work.

Nanosensors Can Scan Blood for Cancer Biomarkers-This has been achieved in whole blood for the first time

A team of experts at the Yale University has recently announced that it has developed a new series of nanosensors, a class of devices that is able to analyze whole blood samples, and detect the presence of cancer biomarkers in them. The latter are chemical agents that tumors and cancer cells produce, and their existence in the body can only mean one thing. The amazing achievement could soon enable physicians to cut the cancer-detection process short, leaving more time for the actual treatments.


Scientists from University of Strathclyde have devised a novel way to harness natural vitamin E extract that would kill tumours within 10 days.

Using a new delivery system, the research team could mobilise an extract from Vitamin E, known ton have anti-cancer properties, to attack cancerous cells.

In the study conducted over skin cancer, the researchers found that tumours started to shrink within 24 hours and almost vanished in ten days.

They believe the tumours might have been completely destroyed if the tests had continued for longer.

When the tumours regrew, they did so at a far slower rate than previously.

Electrocardiographic Rhythms-Biomedical terminology of ECG

Normal sinus rhythm

This is a normal rhythm, and is not of diagnostic significance unless the rate, which ranges from 60 to 100 beats per minute, is not appropriate for the clinical setting.

Sinus tachycardia

This rhythm differs from normal sinus rhythm only in that the rate is above 100 beats per minute. The differential diagnosis is extensive. Common causes are anxiety; physiological stress such as hemorrhage, dehydration, sepsis, and fever; and hyperthyroidism. Correction of the underlying cause, if necessary, is recommended.

Atrial fibrillation detection by heart rate variability in Poincare plot


Atrial fibrillation (AFib) is one of the prominent causes of stroke, and its risk increases with age. We need to detect AFib correctly as early as possible to avoid medical disaster because it is likely to proceed into a more serious form in short time. If we can make a portable AFib monitoring system, it will be helpful to many old people because we cannot predict when a patient will have a spasm of AFib.