Podcast
Questions and Answers
What is the main cause of heart sounds?
What is the main cause of heart sounds?
- Vibrations created by closure of the heart valves (correct)
- The movement of cardiac muscle
- The rhythmicity of the heart rate
- The movement of blood through chambers of the heart
What is the phonocardiograph used for?
What is the phonocardiograph used for?
- To record the sounds connected with the pumping action of the heart (correct)
- To hear heart sounds more clearly
- To measure the heart rate
- To diagnose heart diseases
What is the purpose of phonocardiography?
What is the purpose of phonocardiography?
- To graphically record heart sounds or murmurs (correct)
- To diagnose heart diseases
- To record the heart rate
- To measure the heart rhythmicity
What is a phonocardiogram?
What is a phonocardiogram?
Why is phonocardiography used instead of electronic stethoscopes?
Why is phonocardiography used instead of electronic stethoscopes?
What is the advantage of phonocardiographs over electronic stethoscopes?
What is the advantage of phonocardiographs over electronic stethoscopes?
What can even subtle changes in breath sounds be detected with?
What can even subtle changes in breath sounds be detected with?
What can be impaired in the absence of an airtight seal between stethoscope and skin?
What can be impaired in the absence of an airtight seal between stethoscope and skin?
What is not a capability of electronic stethoscopes?
What is not a capability of electronic stethoscopes?
What determines the quality of sound wave transmission?
What determines the quality of sound wave transmission?
What is the result of the mechanical working processes of the heart?
What is the result of the mechanical working processes of the heart?
According to the valvular theory, where do heart sounds emanate from?
According to the valvular theory, where do heart sounds emanate from?
What occurs during atrial systole in the late diastolic filling period?
What occurs during atrial systole in the late diastolic filling period?
What is the characteristic of innocent murmurs?
What is the characteristic of innocent murmurs?
What is the cause of pathologic murmurs?
What is the cause of pathologic murmurs?
What is necessary for heart murmurs to occur?
What is necessary for heart murmurs to occur?
How are heart murmurs graded?
How are heart murmurs graded?
What is characteristic of a Grade I murmur?
What is characteristic of a Grade I murmur?
What is a common factor involved in the production of murmurs?
What is a common factor involved in the production of murmurs?
What is the primary function of the filter in the instrumentation of murmurs?
What is the primary function of the filter in the instrumentation of murmurs?
What type of microphone is often used in the instrumentation of murmurs?
What type of microphone is often used in the instrumentation of murmurs?
What is the typical bandwidth of the filter used in the instrumentation of murmurs?
What is the typical bandwidth of the filter used in the instrumentation of murmurs?
What is the purpose of the integrator in the instrumentation of murmurs?
What is the purpose of the integrator in the instrumentation of murmurs?
Why is Rochelle salt commonly used in microphones?
Why is Rochelle salt commonly used in microphones?
What happens when mechanical stress is placed on the crystal material in a microphone?
What happens when mechanical stress is placed on the crystal material in a microphone?
Why is the sound pressure in the air chamber kept constant?
Why is the sound pressure in the air chamber kept constant?
What is a characteristic of dynamic microphones?
What is a characteristic of dynamic microphones?
Why is heart sound recording with a microphone valid for a particular frequency only?
Why is heart sound recording with a microphone valid for a particular frequency only?
How is the sound wave coupled to the crystal in some microphones?
How is the sound wave coupled to the crystal in some microphones?
