Phonocardiography - Causes, Symptoms and Treatment .MF .

August 12, 2017 17:52 | In The Cardiology

During its work the heart continuously pumps blood through the body, which is carried by the rhythmic contractions of the heart muscle and smooth-running operation alternate valve apparatus.These processes are accompanied by the sounds that can be heard by applying the ear to the chest or a special tool - stethoscope doctor.If there are any heart disease, it is accompanied by abnormal sound - a change of tones, noises or clicks.For example, for each type of heart disease characterized by certain combinations of sound phenomena.

But not always only using stethoscope possible to distinguish noise and suggest a particular diagnosis.Then, your doctor may prescribe an additional method of patient examination - phonocardiography.

This method of investigation is based on the amplified sound, occurring during the operation of the internal structures of the heart, as well as their registration with subsequent evaluation of the curves.The study on the front chest at six points the best listening heart valve att

ached microphones that convert sound vibrations into electrical.Next phonocardiography signals are processed and recorded in the form of curves using the recorder or the ink on photo paper.For easy evaluation of acoustic phenomena recording is performed simultaneously with the registration of the electrocardiogram.

The advantages of the method include safety, accessibility, informative, non-invasiveness, the possibility of multiple examinations.The complications do not develop during the procedure.

phonocardiography previously applied widely enough, but was gradually forced out of clinical practice more accurate research - echocardiography (ultrasound of the heart).In recent years, there is no need to record and interpret the sound changes as the ultrasound of the heart allows you to visualize, to "see" a vice, but it will be more useful in the diagnostic term than "hear" indirect signs of the same defect.

Indications for examination

main indication for referral to the study is listening to the doctor at survey noise or abnormal tones detected mainly in congenital or acquired heart disease:
- stenosis and / or insufficiency of the mitral, tricuspid, aortic valve, and the valvepulmonary artery,
- defects in the atrial and ventricular septal open arterial canal, congenital stenosis of the aorta and pulmonary artery,
- rheumatism with cardiac disease - rheumatic heart disease, for early detection of emerging heart disease.

research can be illustrated with the following complaints:
- severe shortness of breath when walking, episodes of breathlessness at rest,
- palpitations, arrhythmias at rest or during stress,
- frequent vertigo accompanied by loss of consciousness (due to reduced blood flow to the brainFor example, in aortic insufficiency),
- pain in the heart of various kinds, especially in young patients.

Contra phonocardiography

Do all examinations can be carried out?Contraindications for this method of diagnosis does not exist, so it can be repeatedly carried out for both adults and children.The study may be difficult in case of a severe injury, burns, chest, pronounced obesity and other related conditions that impede a snug fit the microphone to the chest skin.

Decoding results

What can you learn through this method?Upon receipt of the results of the doctor, analyzing the pathological phenomena of sound, their amplitude, location and compliance phases of the cardiac cycle, can get a complete picture of the presence of a heart disease patient.

graphical curve on the sound vibrations are presented strokes, and the more intense the sound, the higher and more densely represented strokes.Normally on phonocardiogram recorded only two colors - the first and second heart sounds, resulting in systole (contraction) and diastole (relaxation) of the heart muscle.When defects are formed different in magnitude and character of the pattern changes the stroke of the curve corresponding to the different phases of the cardiac cycle.For example, in aortic stenosis recorded systolic murmur diamond shape, with mitral stenosis - an increased amplitude first tone and presystolic noise when tricuspid valve - band-shaped systolic murmur with low amplitude, in aortic insufficiency - proto diastolic murmur, etc.

..Furthermore abnormal noise accompanying valvular heart disease, while recording can be recorded phonocardiogram functional noises (particularly frequently occurring in children), as well as noise related anemia or hypertension.

Patients must be remembered that an independent interpretation of the resulting conclusions are not admissible since the results will be able to properly assess a doctor of functional diagnostics and physician - cardiologist.

therapists Sazykina OJ