"Significance "
"Fetal premature atrial contractions are a type of extrasystoles that can be occasionally detected in fetal heart monitoring. They along with fetal premature ventricular contractions (PVC's) account for the majority of in utero rhythm disturbances."
"The PAC may be classified as non-conducted if it is not followed by a V wave or ventricular contraction. A non-compensatory pause should be noted following the PAC; blocked premature atrial contractions may mimic AV block (atrial rate > ventricular rate) but, unlike PACs, AV blocks maintain consistent intervals between atrial events 4."
"The PAC may be classified as non-conducted if it is not followed by a V wave or ventricular contraction. A non-compensatory pause should be noted following the PAC; blocked premature atrial contractions may mimic AV block (atrial rate > ventricular rate) but, unlike PACs, AV blocks maintain consistent intervals between atrial events 4."
"The PAC may be classified as non-conducted if it is not followed by a V wave or ventricular contraction. A non-compensatory pause should be noted following the PAC; blocked premature atrial contractions may mimic AV block (atrial rate > ventricular rate) but, unlike PACs, AV blocks maintain consistent intervals between atrial events 4."
"The PAC may be classified as non-conducted if it is not followed by a V wave or ventricular contraction. A non-compensatory pause should be noted following the PAC; blocked premature atrial contractions may mimic AV block (atrial rate > ventricular rate) but, unlike PACs, AV blocks maintain consistent intervals between atrial events 4."
Expected headings
"Associations"
"Significance "
"Premature atrial contractions may occur at a 1:1 ratio with sinus beats (a pattern of bigeminy), with every second sinus beat (trigeminy) or every third sinus beat (quadrigeminy). Conduction to the ventricles may or may not occur; in the latter instance, no ventricular systole will be observed following atrial systole, and the duration of the pause (non-compensatory, with the total length of the pause less than twice the expected interval between atrial contractions) may be used to distinguish PACs from ectopic beats of a ventricular origin."
"Premature atrial contractions may occur at a 1:1 ratio with sinus beats (a pattern of bigeminy), with every second sinus beat (trigeminy) or every third sinus beat (quadrigeminy). Conduction to the ventricles may or may not occur; in the latter instance, no ventricular systole will be observed following atrial systole, and the duration of the pause (non-compensatory, with the total length of the pause less than twice the expected interval between atrial contractions) may be used to distinguish PACs from ectopic beats of a ventricular origin."
"The PAC may be classified as non-conducted if it is not followed by a V wave or ventricular contraction. A non-compensatory pause should be noted following the PAC; blocked premature atrial contractions may mimic AV block (atrial rate > ventricular rate) but, unlike PACs, AV blocks maintain consistent intervals between atrial events 4."