Cardiovascular System - Heart Rate Development: Difference between revisions
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==Embryonic Heart Rate== | ==Embryonic Heart Rate== | ||
In a 1996 study normal successful human gestations were defined by EHR criteria at different early embryonic (34-56 days from last menstrual period) developmental stages (at the earliest stages when embryo length is difficult to measure gestational sac diameters are included). <ref> | In a 1996 study normal successful human gestations were defined by EHR criteria at different early embryonic (34-56 days from last menstrual period) developmental stages (at the earliest stages when embryo length is difficult to measure gestational sac diameters are included). <ref>{{#pmid:8921130|PMID8921130}} | ||
* Stage 9-10 2 mm embryo (gestational sac diameter of 20 mm) EHR at least 75 beats / minute | * Stage 9-10 2 mm embryo (gestational sac diameter of 20 mm) EHR at least 75 beats / minute | ||
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===Fetal Heart Rate=== | ===Fetal Heart Rate=== | ||
Week 15 ({{GA}} week 17) Fetal Heart Rate audio recording of human embryo heart sounds | Week 15 ({{GA}} week 17) Fetal Heart Rate audio recording of human embryo heart sounds . | ||
[[Fetal_Heart_Sounds_Audio|Fetal Heart Sounds]] | |||
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This movie is a realtime ultrasound recording of the week 12 fetus. The bottom window shows doppler analysis to measure the fetal heart rate. | This movie is a realtime ultrasound recording of the week 12 fetus. The bottom window shows doppler analysis to measure the fetal heart rate. | ||
==Electrocardiogram== | |||
Electrocardiogram (ECG) with a normal ECG on the left and an ECG showing T-wave inversion on the right. | |||
[[File:Schematic ECG normal and inverted T-wave.jpg|600px]] | |||
The T-waves represents the recovery/repolarisation of the ventricles. Inversion of T-waves relate to repolarisation abnormalities which may indicate a problem with the ventricles (in the recovery beat). | |||
==References== | ==References== |
Revision as of 07:57, 8 January 2019
Embryology - 15 Jun 2024 Expand to Translate |
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Introduction
Some Recent Findings
|
Textbooks
- Human Embryology (2nd ed.) Larson Ch7 p151-188 Heart
- The Developing Human: Clinically Oriented Embryology (6th ed.) Moore and Persaud Ch14: p304-349
- Before we Are Born (5th ed.) Moore and Persaud Ch12; p241-254
- Essentials of Human Embryology Larson Ch7 p97-122 Heart
- Human Embryology Fitzgerald and Fitzgerald Ch13-17: p77-111
Embryonic Heart Rate
In a 1996 study normal successful human gestations were defined by EHR criteria at different early embryonic (34-56 days from last menstrual period) developmental stages (at the earliest stages when embryo length is difficult to measure gestational sac diameters are included). <ref>[3]
- Stage 9-10 2 mm embryo (gestational sac diameter of 20 mm) EHR at least 75 beats / minute
- Stage 11-12 5 mm embryo (gestational sac diameter of 30 mm) EHR at least 100 beats / minute
- Stage 16 10 mm embryo EHR at least 120 beats / minute
- Stage 18 15 mm embryo EHR at least 130 beats / minute
Fetal Heart Rate
Week 15 (GA week 17) Fetal Heart Rate audio recording of human embryo heart sounds .
<html5media>File:Week17 fetal heart rate.mp3</html5media>
Ultrasound Measurement
This movie is a realtime ultrasound recording of the week 12 fetus. The bottom window shows doppler analysis to measure the fetal heart rate.
Electrocardiogram
Electrocardiogram (ECG) with a normal ECG on the left and an ECG showing T-wave inversion on the right.
The T-waves represents the recovery/repolarisation of the ventricles. Inversion of T-waves relate to repolarisation abnormalities which may indicate a problem with the ventricles (in the recovery beat).
References
- ↑ Grivell RM, Alfirevic Z, Gyte GM & Devane D. (2012). Antenatal cardiotocography for fetal assessment. Cochrane Database Syst Rev , 12, CD007863. PMID: 23235650 DOI.
- ↑ Papaioannou GI, Syngelaki A, Poon LC, Ross JA & Nicolaides KH. (2010). Normal ranges of embryonic length, embryonic heart rate, gestational sac diameter and yolk sac diameter at 6-10 weeks. Fetal. Diagn. Ther. , 28, 207-19. PMID: 20847544 DOI.
- ↑ Coulam CB, Britten S & Soenksen DM. (1996). Early (34-56 days from last menstrual period) ultrasonographic measurements in normal pregnancies. Hum. Reprod. , 11, 1771-4. PMID: 8921130
Reviews
Strasburger JF & Wakai RT. (2010). Fetal cardiac arrhythmia detection and in utero therapy. Nat Rev Cardiol , 7, 277-90. PMID: 20418904 DOI.
Bennet L & Gunn AJ. (2009). The fetal heart rate response to hypoxia: insights from animal models. Clin Perinatol , 36, 655-72. PMID: 19732619 DOI.
Butcher JT & Markwald RR. (2007). Valvulogenesis: the moving target. Philos. Trans. R. Soc. Lond., B, Biol. Sci. , 362, 1489-503. PMID: 17569640 DOI.
Articles
Hashima JN, Frias AE, Bernard L, Spindel ER, Hobbs TR & Rasanen J. (2010). Fetal ventricular diastolic filling characteristics in a primate model: the role of fetal heart rate and pulmonary vascular impedance. Reprod Sci , 17, 760-6. PMID: 20595708 DOI.
Park YS, Koh SK, Hoh JK & Park MI. (2010). Difference of fetal heart rate accelerations based on 10 and 15 beats per minute. J. Obstet. Gynaecol. Res. , 36, 291-5. PMID: 20492379 DOI.
Search Pubmed
Search Nov 2010 "Embryonic Heart Rate" All (7589) Review (405) Free Full Text (794)
Search Pubmed: Embryonic Heart Rate
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Cite this page: Hill, M.A. (2024, June 15) Embryology Cardiovascular System - Heart Rate Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Cardiovascular_System_-_Heart_Rate_Development
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G