PG Blazer MCQ Series added as Podcast: www.youtube.com/playlist?list... More MCQs being added daily to the podcast. Useful for you to listen and learn on the move!
How is high voltage generated in defibrillator?
USB hubs come in handy when you run short of USB ports on your laptops, a scenario common with hobbyists and professionals alike! USB hubs can be passive or active, with its own power supply.
Take care of your gums and keep your heart safe! Periodontal disease linked to heart failure - New study report. It is already known that periodontal disease is linked to atherosclerotic cardiovascular disease. Brush Your Teeth To Stay Heart Healthy!: https://youtu.be/4nVHcdOIR7Q Periodontal disease linked to heart failure โ New study report: https://youtu.be/L6heunSEhBI
SPECT stands for single photon emission computed tomography. A radioactive tracer like technetium sestamibi is injected intravenously and nuclear scan images using a gamma camera obtained after 20 minutes. This will show the uptake of the tracer at various regions of the heart.
After that those who can walk on a treadmill will be connected with electrodes for monitoring ECG during the test. Treadmill slope and speed are typically increased every three minutes and maximal exercise without angina or ECG changes is achieved. The test is terminated earlier in case of significant angina, other major symptoms, or ECG changes. The ECG printouts are analysed by the supervising physician.
At maximal exercise, one more injection of radioactive tracer is given. One more nuclear scan is done after waiting about 20 minutes with the gamma camera. The rest images are compared with the exercise images by the nuclear medicine physician.
Here is a normal 12 lead ECG. 12 lead ECG consists of three standard limb leads (Leads I, II and III), three augmented limb leads (aVR, aVL, and aVF) and six chest leads (V1 to V6). All the twelve leads have recorded ECG of three cardiac cycles in this tracing.
There is a long lead II recording at the bottom of the tracing which is a rhythm strip enabling better assessment of the cardiac rhythm.
12 Leads can be acquired simultaneously and printed sequentially as in a 12 channel machine or can be acquired sequentially as in a single channel ECG machine. This particular tracing was recorded using a 12 channel ECG machine.
For medicos: Left bundle branch block (LBBB) induced cardiomyopathy is due to the mechanical dyssynchrony caused by the abnormal activation pattern in LBBB. Response to cardiac resynchronization therapy (CRT) is excellent in this group and may be called super responders. Left bundle branch pacing has shown promise an alternative to biventricular pacing in LBBB induced cardiomyopathy.
For medicos: On the diagnosis of ventricular tachycardia. Clinical findings can supplement ECG.
For medicos: The term โWindkessel effectโ is used in the setting of large elastic arteries like aorta. The original term โWindkesselโ means โair chamberโ in German language. It was an air chamber used in fire engines in the 18th century, to maintain continuous delivery of water for fire-fighting. In the case of aorta, the aortic elasticity causes expansion and temporary storage of blood in systole so that more blood enters the aorta than what leaves it in systole. This buffer stock of blood is released during diastole, to maintain organ perfusion. The Windkessel effect makes aorta function as a โsecond pumpโ in diastole. This diastolic flow is quite important in the case of coronary perfusion as most of the coronary perfusion is diastolic.
For medicos: Lutembacher syndrome is a combination of atrial septal defect with mitral stenosis. Each lesion has a significant effect on the hemodynamics of the other one.
This channel is meant only for giving health education information for general use. Though this channel is meant for general public, early career medicos and paramedics may also find it useful.
Malayalam and Hindi versions are being made with support from Google Translate, supplemented by my own knowledge of the languages.
เคเฅเคเคฒ เค
เคจเฅเคตเคพเคฆ เคเฅ เคธเคฎเคฐเฅเคฅเคจ เคธเฅ เคฎเคฒเคฏเคพเคฒเคฎ เคเคฐ เคนเคฟเคเคฆเฅ เคธเคเคธเฅเคเคฐเคฃ เคฌเคจเคพเค เคเคพ เคฐเคนเฅ เคนเฅเค, เคเฅ เคญเคพเคทเคพเคเค เคเฅ เคฎเฅเคฐเฅ เค
เคชเคจเฅ เคเฅเคเคพเคจ เคเฅ เคชเฅเคฐเค เคนเฅเคเฅค
เดเตเดเดฟเตพ เดตเดฟเดตเตผเดคเตเดคเดจเดคเตเดคเดฟเดจเตเดฑเต เดธเดนเดพเดฏเดคเตเดคเตเดเตเดฏเดพเดฃเต เดฎเดฒเดฏเดพเดณเด, เดนเดฟเดจเตเดฆเดฟ เดชเดคเดฟเดชเตเดชเตเดเตพ เดจเดฟเตผเดฎเตเดฎเดฟเดเตเดเตเดจเตเดจเดคเต.
Channel for Medical and Paramedical Students and Professionals is at: youtube.com/c/JohnsonFrancisMBBSMDDM
Please note that this channel is NOT meant for any medical advice. Please contact your physician for medical advice.
About the Author: Former Professor of Cardiology, Government Medical College, Kozhikode, Kerala, India. Retired from medical practice.