PMID- 16479051
OWN - NLM
STAT- MEDLINE
DCOM- 20071213
LR  - 20191109
IS  - 1349-2365 (Print)
IS  - 1349-2365 (Linking)
VI  - 47
IP  - 1
DP  - 2006 Jan
TI  - Variation in parasystolic cycle length.
PG  - 153-8
AB  - At the time of the first visit to our clinic, an electrocardiographic examination 
      of a 73-year-old female patient revealed ventricular premature contractions 
      (VPCs) with variable coupling intervals that were diagnosed as parasystole. 
      Characteristically many of the parasystoles had no sinus contractions between two 
      consecutive VPCs, which we referred to as pure parasystole. We first repeatedly 
      examined variations in the length of the parasystolic cycles between January 6, 
      1997 and March 2, 2003 using electrocardiography. The time courses recorded over 
      this period showed that the length of the parasystolic cycle did not remain 
      constant, but varied irregularly within a relatively narrow range. We also 
      recorded the length of the parasystolic cycles over 3 hours using Holter 
      monitoring. The interectopic intervals plotted against mean sinus cycle length 
      showed that the cycle length of pure parasystoles remained almost constant at 
      about 1,300 ms over the 3 hours. We also examined the cycle length during 
      exercise and found that it was slightly prolonged thereafter, while the sinus 
      cycle length was clearly shortened after exercise. The average of six deep 
      breathing tests showed that parasystolic cycle length did not significantly 
      differ between deep inspiration and deep expiration, whereas the sinus cycle 
      length during expiration was significantly longer than that during inspiration. 
      These results indicate that the responses to both exercise and deep breathing 
      obviously differed between the parasystolic and sinus cycle lengths.
FAU - Ono, Chikako
AU  - Ono C
AD  - Division of Cardiovascular Disease, The Institute for Adult Diseases Asahi Life 
      Foundation, Tokyo, Japan.
FAU - Ashida, Terunao
AU  - Ashida T
FAU - Sugiyama, Takao
AU  - Sugiyama T
FAU - Fujii, Jun
AU  - Fujii J
FAU - Takayanagi, Kan
AU  - Takayanagi K
LA  - eng
PT  - Case Reports
PT  - Journal Article
PL  - Japan
TA  - Int Heart J
JT  - International heart journal
JID - 101244240
SB  - IM
MH  - Aged
MH  - Electrocardiography
MH  - Female
MH  - Heart Ventricles
MH  - Humans
MH  - Parasystole/*diagnosis/*physiopathology
EDAT- 2006/02/16 09:00
MHDA- 2007/12/14 09:00
CRDT- 2006/02/16 09:00
PHST- 2006/02/16 09:00 [pubmed]
PHST- 2007/12/14 09:00 [medline]
PHST- 2006/02/16 09:00 [entrez]
AID - JST.JSTAGE/ihj/47.153 [pii]
AID - 10.1536/ihj.47.153 [doi]
PST - ppublish
SO  - Int Heart J. 2006 Jan;47(1):153-8. doi: 10.1536/ihj.47.153.