An ECG is utilized for diagnosing disorders of the ?
Show answer Hide answer
Answer: B. Heart
Explanation
An electrocardiogram records electrical signals traveling through the muscular walls of the human heart. Cardiologists analyze wave patterns on the printed readout to identify rhythm disturbances and ischemic damage. Electrodes placed on the skin detect minute electrical voltage changes generated during every single heartbeat. Heart muscle contractions are triggered by specialized electrical pacemaker cells located within cardiac tissue. Willem Einthoven invented the practical electrocardiograph, revolutionizing non-invasive cardiovascular diagnostics during medical examinations. Standard ECG tests utilize multiple electrode leads to view electrical activity from various spatial angles.
Emergency rooms rely on continuous ECG monitoring to detect acute myocardial infarctions and arrhythmias quickly. Routine physical examinations often include an electrocardiogram to screen for underlying asymptomatic cardiac abnormalities. Athletes sometimes undergo cardiac testing to ensure their hearts can handle extreme physical exertion safely. Brain activity is measured using specialized electroencephalograms rather than standard cardiovascular electrical monitoring equipment. Kidney disorders require urinalysis and blood chemistry tests instead of electrical rhythm recording devices. Pulmonary function tests evaluate breathing capacity rather than tracking the electrical impulses of the heart.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Earth completes its revolution around the sun in___________?
Show answer Hide answer
Answer: A. 23 hours 56 min 4 sec
Earth rotates relative to distant stars in twenty three hours and minutes. This specific duration defines what astronomers refer to as a sidereal day. The measurement is slightly shorter than a solar day due to orbital m...
Q2. Earthquakes are triggered by:
Show answer Hide answer
Answer: D. All of these
Earthquakes are triggered by tectonic plates, volcanic eruptions, and massive landslides. Seismic waves radiate outward when accumulated geological stress suddenly releases. All these listed natural phenomena can generat...
Q3. Seismic waves propagate with greater speed through __________?
Show answer Hide answer
Answer: A. Water
Seismic waves depend on the elastic properties and density of the medium through which they travel. Water and solid rocks are denser and less compressible than gases like air, facilitating faster wave transmission. The h...
Q4. The Earth is categorized into the succeeding three strata?
Show answer Hide answer
Answer: D. Crust, Mantel, Core
Geologists classify the interior of the Earth into three major chemical strata. These distinct layers are universally known as the crust mantle and core. Each layer possesses unique mineral compositions and physical stat...
Q5. The earth’s ___________ is segmented into 15 major plates of varying dimensions
Show answer Hide answer
Answer: C. Lithosphere
The earth lithosphere is segmented into fifteen major plates of varying dimensions. These rigid plates float atop the semi-fluid asthenosphere of the upper mantle. Continuous movement of these plates shapes the global ge...
Q6. Diamond exhibits greater hardness than Graphite owing to___________?
Show answer Hide answer
Answer: A. Difference in crystalline Structure
Diamonds and graphite are both composed entirely of carbon atoms arranged in different crystalline structures. Diamond features a rigid three-dimensional tetrahedral lattice where every carbon atom bonds strongly to four...